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Subsidiary undertakings (Narrative) (Details)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 19, 2024
Jul. 22, 2024
Disclosure of subsidiaries [line items]          
Percentage of voting equity interests acquired 100.00%        
GeoPark Argentina S.A. (Argentina) [Member]          
Disclosure of subsidiaries [line items]          
Subsidiary ownership percentage by parent       81.7  
GeoPark Colombia Coperatie U.A. (The Netherlands) [member]          
Disclosure of subsidiaries [line items]          
Subsidiary ownership percentage by noncontrolling owner       17.40%  
GeoPark (UK) Limited (United Kingdom) [Member]          
Disclosure of subsidiaries [line items]          
Subsidiary ownership percentage by noncontrolling owner       0.90%  
Los Parlamentos (Argentina) [Member]          
Disclosure of subsidiaries [line items]          
Proportion of ownership interest in joint operation 50.00%        
Working interest percentage transferred 50.00%        
Llanos 94 Block (Colombia) [Member]          
Disclosure of subsidiaries [line items]          
Proportion of ownership interest in joint operation 50.00% 50.00% 50.00%    
Espejo and Perico Blocks [Member]          
Disclosure of subsidiaries [line items]          
Proportion of ownership interest in joint operation 50.00%        
GeoPark Ecuador S.A. (Ecuador) [Member] | GeoPark Colombia Coperatie U.A. (The Netherlands) [member]          
Disclosure of subsidiaries [line items]          
Working Interest Percentage Acquired         99.40%