UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2026

Commission File Number: 001-36298

GeoPark Limited
(Exact name of registrant as specified in its charter)

Calle 94 N° 11-30 8° piso
Bogota, Colombia
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

GEOPARK LIMITED

TABLE OF CONTENTS

Item 1

FOR IMMEDIATE DISTRIBUTION

GEOPARK LIMITED PRICES OFFERING OF

U.S.$550,000,000 9.500% SENIOR NOTES DUE 2033

Bogotá, Colombia, October 21, 2026 – GeoPark Limited (“GeoPark” or the “Company”) (NYSE: GPRK), an exempted company incorporated under the laws of Bermuda, today announced the pricing of U.S.$550,000,000 aggregate principal amount of 9.500% senior notes due 2033 (the “Notes”). The Notes were offered in a private placement to qualified institutional buyers in accordance with Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and outside the United States to non-U.S. persons in accordance with Regulation S under the Securities Act. The Notes will be fully and unconditionally guaranteed jointly and severally by GeoPark Colombia S.L.U., GeoPark Colombia S.A.S., and GeoPark Argentina S.A. The settlement of the Notes offering is expected to take place on October 28, 2026, subject to customary closing conditions.

The net proceeds from the Notes offering will be used by the Company to repurchase the Company’s outstanding 8.750% senior notes due 2030 (the “2030 Notes”) through a concurrent tender offer, to repay or redeem, in whole or in part, certain of its existing indebtedness, including the Company’s outstanding 5.500% senior notes due 2027, to fund capital expenditures related to the development of its Vaca Muerta assets over the next 18 months, and for general corporate purposes.

This press release does not constitute an offer to sell or a solicitation of an offer to buy these securities, nor will there be any sale of these securities, in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any state or jurisdiction. The Notes have not been registered under the Securities Act, or any applicable state securities laws, and will be offered only to qualified institutional buyers pursuant to Rule 144A promulgated under the Securities Act and outside the United States to non-U.S. persons in accordance with Regulation S under the Securities Act. Unless so registered, the Notes may not be offered or sold in the United States except pursuant to an exemption from the registration requirements of the Securities Act and any applicable state securities laws.

For further information, please contact:

INVESTORS:

MEDIA:

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CAUTIONARY STATEMENT ON FORWARD-LOOKING STATEMENTS

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements often are preceded by words such as “believes,” “expects,” “may,” “anticipates,” “plans,” “intends,” “assumes,” “will” or similar expressions. The forward-looking statements contained herein include statements about the tender offer for the 2030 Notes, the Company’s Notes offering and its intended use of proceeds therefrom. These expectations may or may not be realized. Some of these expectations may be based upon assumptions or judgments that prove to be incorrect. In addition, GeoPark’s business and operations involve numerous risks and uncertainties, many of which are beyond the control of GeoPark, which could result in GeoPark’s expectations not being realized or otherwise materially affect the financial condition, results of operations and cash flows of GeoPark. Some of the factors that could cause future results to materially differ from recent results or those projected in forward-looking statements are described in GeoPark’s filings with the United States Securities and Exchange Commission.

The forward-looking statements are made only as of the date hereof, and GeoPark does not undertake any obligation to (and expressly disclaims any obligation to) update any forward-looking statements to reflect events or circumstances after the date such statements were made, or to reflect the occurrence of unanticipated events. In light of the risks and uncertainties described above, and the potential for variation of actual results from the assumptions on which certain of such forward-looking statements are based, investors should keep in mind that the results, events or developments disclosed in any forward-looking statement made in this document may not occur, and that actual results may vary materially from those described herein, including those described as anticipated, expected, targeted, projected or otherwise.

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, thereunto duly authorized.

Date: October 21, 2026