Production and operating costs - Energy cost risk management contracts (Details)	Dec. 31, 2025 MWh GWh $ / kWh	Sep. 30, 2025 GWh $ / kWh
Production and operating costs
Energy related derivatives capacity covered \| MWh	12.5
Energy derivative capacity per month \| GWh	9	9
Price risk option strike price \| $ / kWh	350	312

The strike price on the price risk option contract such as a put option or a call option.

No definition available.

Name:	gprk_IfrsDerivativePriceRiskOptionStrikePrice
Namespace Prefix:	gprk_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant