v3.26.1
Cover Page - shares
 6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-34018  
Entity Registrant Name GRAN TIERRA ENERGY INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 98-0479924  
Entity Address, Address Line One 500 Centre Street S.E.  
Entity Address, City or Town Calgary,  
Entity Address, State or Province AB  
Entity Address, Country CA  
Entity Address, Postal Zip Code T2G 1A6  
City Area Code 403  
Local Phone Number 265-3221  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol GTE  
Security Exchange Name NYSEAMER  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   35,380,429
Entity Central Index Key 0001273441  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false