Groowe Groowe BETA / Newsroom
⏱ News is delayed by 15 minutes. Sign in for real-time access. Sign in

Form 8-K

sec.gov

8-K — GLADSTONE COMMERCIAL CORP

Accession: 0001234006-26-000013

Filed: 2026-05-05

Period: 2026-05-05

CIK: 0001234006

SIC: 6519 (LESSORS OF REAL PROPERTY, NEC)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — good-20260505.htm (Primary)

EX-99.1 (q12026pressrelease3312026.htm)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: good-20260505.htm · Sequence: 1

good-20260505

0001234006false00012340062026-05-052026-05-050001234006us-gaap:CommonStockMember2026-05-052026-05-050001234006good:A7.00SeriesDCumulativeRedeemablePreferredStockMember2026-05-052026-05-050001234006good:A6.625SeriesECumulativeRedeemablePreferredStockMember2026-05-052026-05-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_____________________

Form 8-K

_____________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event Reported): May 5, 2026

Gladstone Commercial Corporation

(Exact Name of Registrant as Specified in Charter)

Maryland 001-33097 02-0681276

(State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification Number)

1521 Westbranch Drive, Suite 100, McLean, Virginia 22102

(Address of Principal Executive Offices) (Zip Code)

(703) 287-5800

(Registrant's telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class   Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.001 per share GOOD The Nasdaq Stock Market LLC

6.625% Series E Cumulative Redeemable Preferred Stock, par value $0.001 per share GOODN The Nasdaq Stock Market LLC

6.00% Series G Cumulative Redeemable Preferred Stock, par value $0.001 per share GOODO The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02 Results of Operations and Financial Condition.

On May 5, 2026, Gladstone Commercial Corporation issued a press release announcing its financial results for the first quarter ended March 31, 2026. The text of the press release is included as Exhibit 99.1 to this Current Report on Form 8-K. Pursuant to the rules and regulations of the Securities and Exchange Commission, such exhibit and the information set forth therein and herein are deemed to be furnished and shall not be deemed to be filed.

Item 9.01. Financial Statements and Exhibits.

(a) Not applicable.

(b) Not applicable.

(c) Not applicable.

(d) Exhibits.

Exhibit No.   Description

99.1

Press release dated May 5, 2026.

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Gladstone Commercial Corporation

Date: May 5, 2026 By:  /s/ Gary Gerson

Gary Gerson

Executive Vice President and Chief Financial Officer

EX-99.1

EX-99.1

Filename: q12026pressrelease3312026.htm · Sequence: 2

Document

Gladstone Commercial Corporation Reports Results for the First Quarter Ended March 31, 2026

Please note that the limited information that follows in this press release is not adequate to make an informed investment judgment.

MCLEAN, VA, May 5, 2026 (ACCESSWIRE) -- Gladstone Commercial Corporation (Nasdaq: GOOD) ("Gladstone Commercial" or the "Company") today reported financial results for the first quarter ended March 31, 2026. A description of funds from operations, or FFO, and Core FFO, both non-GAAP (generally accepted accounting principles in the United States) financial measures, are located at the end of this press release. All per share references are to fully-diluted weighted average shares of common stock and Non-controlling OP Units, unless otherwise noted. For further detail, please also refer to both the quarterly financial supplement and the Company's Quarterly Report on Form 10-Q, which can be retrieved from the Investors section of our website at www.gladstonecommercial.com.

Summary Information (dollars in thousands, except share and per share data):

As of and for the three months ended

March 31, 2026 December 31, 2025 $ Change % Change

Operating Data:

Total operating revenue $ 41,909  $ 43,461  $ (1,552) (3.6) %

Total operating expenses (25,243) (26,367) 1,124  (4.3) %

Other expense, net (9,694) (11,712) 2,018  (17.2) %

Net income $ 6,972  $ 5,382  $ 1,590  29.5  %

Less: Dividends attributable to preferred stock (3,042) (3,048) 6  (0.2) %

Less: Dividends attributable to senior common stock (98) (102) 4  (3.9) %

Add: Gain on extinguishment of Series F preferred stock, net 4  5  (1) (20.0) %

Net income available to common stockholders and Non-controlling OP Unitholders $ 3,836  $ 2,237  $ 1,599  71.5  %

Add: Real estate depreciation and amortization 14,796  15,482  (686) (4.4) %

Less: Gain on sale of real estate, net (1,783) —  (1,783) (100.0) %

Funds from operations available to common stockholders and Non-controlling OP Unitholders - basic $ 16,849  $ 17,719  $ (870) (4.9) %

Add: Convertible senior common distributions 98  102  (4) (3.9) %

Funds from operations available to common stockholders and Non-controlling OP Unitholders - diluted $ 16,947  $ 17,821  $ (874) (4.9) %

Funds from operations available to common stockholders and Non-controlling OP Unitholders - basic $ 16,849  $ 17,719  $ (870) (4.9) %

Add: Asset retirement obligation expense 37  36  1  2.8  %

Add: Realized loss on interest rate hedging instruments 29  —  29  100.0  %

Core funds from operations available to common stockholders and Non-controlling OP Unitholders - basic $ 16,915  $ 17,755  $ (840) (4.7) %

Add: Convertible senior common distributions 98  102  (4) (3.9) %

Core funds from operations available to common stockholders and Non-controlling OP Unitholders - diluted $ 17,013  $ 17,857  $ (844) (4.7) %

Share and Per Share Data:

Net income available to common stockholders and Non-controlling OP Unitholders - basic and diluted $ 0.08  $ 0.05  $ 0.03  60.0  %

FFO available to common stockholders and Non-controlling OP Unitholders - basic $ 0.35  $ 0.37  $ (0.02) (5.4) %

FFO available to common stockholders and Non-controlling OP Unitholders - diluted $ 0.35  $ 0.37  $ (0.02) (5.4) %

Core FFO available to common stockholders and Non-controlling OP Unitholders - basic $ 0.35  $ 0.37  $ (0.02) (5.4) %

Core FFO available to common stockholders and Non-controlling OP Unitholders - diluted $ 0.35  $ 0.37  $ (0.02) (5.4) %

Weighted average shares of common stock and Non-controlling OP Units outstanding - basic 48,446,467  48,442,596  3,871  —  %

Weighted average shares of common stock and Non-controlling OP Units outstanding - diluted 48,768,782  48,764,911  3,871  —  %

Cash dividends declared per common share and Non-controlling OP Unit $ 0.30  $ 0.30  $ —  —  %

Financial Position

Real estate, before accumulated depreciation $ 1,404,695  (1) $ 1,402,640  (2) $ 2,055  0.1  %

Total assets $ 1,230,988  $ 1,246,933  $ (15,945) (1.3) %

Mortgage notes payable, net, borrowings under revolver, borrowings under term loan, net, and senior unsecured notes, net $ 836,385  $ 843,466  $ (7,081) (0.8) %

Total equity and mezzanine equity $ 333,633  $ 341,933  $ (8,300) (2.4) %

Properties owned 151  (1) 151  (2) —  —  %

Square feet owned 17,675,963  (1) 17,675,963  (2) —  —  %

Square feet leased 98.7  % 99.1  % (0.4) % (0.4) %

(1)Includes one property classified as held for sale of $12.0 million and 161,458 square feet.

(2)Includes one property and a portion of a land parcel classified as held for sale of $12.2 million and 161,458 square feet, in the aggregate.

First Quarter Activity:

•Collected 100% of cash rents: Collected 100% of cash rents due during January, February, and March;

•Sold properties: Sold a portion of a land parcel for $2.0 million;

•Completed leasing activity: Leased or renewed 805,622 square feet with remaining lease terms ranging from 0.7 years to 6.0 years at five of our properties;

•Repaid debt: Repaid $1.5 million in fixed rate mortgage debt at a weighted average interest rate of 6.58%;

•Extended mortgage debt maturity date: Extended the maturity date of $7.8 million swapped to fixed rate mortgage debt with an interest rate of 3.78% for an additional year; and

•Paid distributions: Paid monthly cash distributions for the quarter totaling $0.30 per share on our common stock and Non-controlling OP Units, $0.414063 per share on our Series E Preferred Stock, $0.375 per share on our Series F Preferred Stock, $0.375 per share on our Series G Preferred Stock, and $0.2625 per share on our senior common stock.

First Quarter 2026 Results: Core FFO available to common shareholders and Non-controlling OP Unitholders for the three months ended March 31, 2026 was $17.0 million, a 4.7% decrease when compared to the three months ended December 31, 2025, equaling $0.35 per share. Core FFO decreased primarily due to a lease termination fee and proceeds from an easement settlement recognized in the prior period, partially offset by a lower net incentive fee in the current period and a decrease in interest expense from deferred financing fees written off in the prior period as part of the credit facility recast.

Net income available to common stockholders and Non-controlling OP Unitholders for the three months ended March 31, 2026 was $3.8 million, or $0.08 per share, compared to net income available to common stockholders and Non-controlling OP Unitholders for the three months ended December 31, 2025 of $2.2 million, or $0.05 per share. In the Summary Information table above, we provide a reconciliation of Core FFO to net income (which we believe is the most directly comparable GAAP measure to Core FFO) for the three months ended March 31, 2026 and December 31, 2025, a computation of basic and diluted Core FFO per weighted average share of common stock and Non-controlling OP Unit, and basic and diluted net income per weighted average share of common stock and Non-controlling OP Unit.

Subsequent to the end of the quarter:

•Collected 100% of April cash rents: Collected 100% of cash rents due in April;

•Declared distributions: Declared monthly cash distributions for April, May, and June 2026, totaling $0.30 per share on our common stock and Non-controlling OP Units, $0.414063 per share on our Series E Preferred Stock, $0.375 per share on our Series F Preferred Stock, $0.375 per share on our Series G Preferred Stock, and $0.2625 per share on our senior common stock.

Comments from Gladstone Commercial’s Chief Executive Officer and President, Buzz Cooper: "Our financial results reflect consistent performance and stabilized revenues from our tremendous same store property occupancy, rent collection and growth, accretive real estate investments, and our ability to renew tenants. We plan to continue our capital recycling program, whereby we sell non-core assets and use the proceeds to de-lever our portfolio, as well as to acquire properties in our target growth markets. We will continue to opportunistically sell non-core assets and redeploy the proceeds into stronger target growth markets with a focus on industrial investment opportunities. While we expect to face challenges due to inflation, with a corresponding increase in interest rates, and various geo-political and economic issues, we feel strongly about the depth of our tenant credit underwriting. We have collected 100% of the first quarter's cash rents and 100% of April cash rents. We anticipate our tenants will successfully navigate the current economic climate and will be able to continue operating successfully when economic normalcy returns fully. Despite economic uncertainty, so far during 2026, we leased or renewed 805,622 square feet with five tenants. We are actively marketing our remaining vacant space and currently anticipate positive outcomes. We expect to continue to have access to the debt and equity markets, as necessary, for added liquidity. We believe our same store rents, which have increased by 2% or greater annually in recent years, should continue to rise as we grow, and we will continue to primarily focus on investing in our target markets, with an emphasis on industrial properties and actively managing our portfolio."

Conference Call: Gladstone Commercial will hold a conference call on Wednesday, May 6, 2026, at 8:30 a.m. Eastern Time to discuss its earnings results. Please call (877) 407-9045 to enter the conference call. An operator will monitor the call and set a queue for questions. A conference call replay will be available beginning one hour after the call and will be accessible through May 13, 2026. To hear the replay, please dial (877) 660-6853 and use playback conference number 13759086. The live audio broadcast of the Company's quarterly conference call will also be available on the investors section of our website, www.gladstonecommercial.com.

About Gladstone Commercial: Gladstone Commercial Corporation is a real estate investment trust focused on acquiring, owning, and operating net leased industrial and office properties across the United States. Further information can be found at www.gladstonecommercial.com.

About the Gladstone Companies: Information on the business activities of the Gladstone family of funds can be found at www.gladstonecompanies.com.

Investor Relations: For Investor Relations inquiries related to any of the monthly distribution-paying Gladstone family of funds, please visit www.gladstonecompanies.com.

Non-GAAP Financial Measures:

FFO: The National Association of Real Estate Investment Trusts (“NAREIT”) developed FFO as a relative non-GAAP supplemental measure of operating performance of an equity REIT to recognize that income-producing real estate historically has not depreciated on the basis determined under GAAP. FFO, as defined by NAREIT, is net income (computed in accordance with GAAP), excluding gains (or losses) from sales of property and impairment losses on property, plus depreciation and amortization of real estate assets, and after adjustments for unconsolidated partnerships and joint ventures. FFO does not represent cash flows from operating activities determined in accordance with GAAP and should not be considered an alternative to net income as an indication of its performance or to cash flow from operations as a measure of liquidity or ability to make distributions. The Company believes that FFO per share provides investors with an additional context for evaluating its financial performance and as a supplemental measure to compare it to other REITs; however, comparisons of its FFO to the FFO of other REITs may not necessarily be meaningful due to potential differences in the application of the NAREIT definition used by such other REITs.

Core FFO: Core FFO is FFO adjusted for certain items that are not indicative of the results provided by the Company’s operating portfolio and affect the comparability of the Company’s period-over-period performance. These items include the adjustment for acquisition related expenses, gains or losses from early extinguishment of debt and any other non-recurring expense adjustments. Although the Company’s calculation of Core FFO differs from NAREIT’s definition of FFO and may not be comparable to that of other REITs, the Company believes it is a meaningful supplemental measure of its operating performance. Accordingly, Core FFO should be considered a supplement to net income computed in accordance with GAAP as a measure of our performance.

The Company’s presentation of FFO, as defined by NAREIT, or presentation of Core FFO, does not represent cash flows from operating activities determined in accordance with GAAP and should not be considered an alternative to net income as an indication of its performance or to cash flow from operations as a measure of liquidity or ability to make distributions.

The statements in this press release regarding the forecasted stability of Gladstone Commercial’s income, its ability, plans or prospects to re-lease its unoccupied properties, and grow its portfolio are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements inherently involve certain risks and uncertainties, although they are based on Gladstone Commercial’s current plans that are believed to be reasonable as of the date of this press release. Factors that may cause actual results to differ materially from these forward-looking statements include, but are not limited to, Gladstone Commercial’s ability to raise additional capital; availability and terms of capital and financing, both to fund its operations and to refinance its indebtedness as it matures; downturns in the current economic environment; the performance of its tenants; the impact of competition on its efforts to renew existing leases or re-lease space; and significant changes in interest rates. Additional factors that could cause actual results to differ materially from those stated or implied by its forward-looking statements are disclosed under the caption "Risk Factors" of its Form 10-K for the fiscal year ended December 31, 2025, as filed with the SEC on February 18, 2026, and other reports filed with the SEC. Gladstone Commercial cautions readers not to place undue reliance on any such forward-looking statements, which speak only as of the date made. Gladstone Commercial undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

CONTACT:

Gladstone Commercial Corporation

(703) 287-5893

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 8

v3.26.1

Cover Page

May 05, 2026

Entity Information [Line Items]

Document Type

8-K

Document Period End Date

May 05, 2026

Entity Central Index Key

0001234006

Amendment Flag

false

Entity Registrant Name

Gladstone Commercial Corp

Entity Incorporation, State or Country Code

MD

Entity File Number

001-33097

Entity Tax Identification Number

02-0681276

Entity Address, Address Line One

1521 Westbranch Drive

Entity Address, Address Line Two

Suite 100

Entity Address, City or Town

McLean

Entity Address, State or Province

VA

Entity Address, Postal Zip Code

22102

City Area Code

703

Local Phone Number

287-5800

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Entity Emerging Growth Company

false

Common Stock

Entity Information [Line Items]

Title of 12(b) Security

Common Stock, par value $0.001 per share

Trading Symbol

GOOD

Security Exchange Name

NASDAQ

7.00% Series D Cumulative Redeemable Preferred Stock

Entity Information [Line Items]

Title of 12(b) Security

6.625% Series E Cumulative Redeemable Preferred Stock, par value $0.001 per share

Trading Symbol

GOODN

Security Exchange Name

NASDAQ

6.625% Series E Cumulative Redeemable Preferred Stock

Entity Information [Line Items]

Title of 12(b) Security

6.00% Series G Cumulative Redeemable Preferred Stock, par value $0.001 per share

Trading Symbol

GOODO

Security Exchange Name

NASDAQ

X

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

na

Period Type:

duration

X

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:

dei_EntityInformationLineItems

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Details

Name:

us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember

Namespace Prefix:

Data Type:

na

Balance Type:

Period Type:

X

- Details

Name:

us-gaap_StatementClassOfStockAxis=good_A7.00SeriesDCumulativeRedeemablePreferredStockMember

Namespace Prefix:

Data Type:

na

Balance Type:

Period Type:

X

- Details

Name:

us-gaap_StatementClassOfStockAxis=good_A6.625SeriesECumulativeRedeemablePreferredStockMember

Namespace Prefix:

Data Type:

na

Balance Type:

Period Type: