A method and system for regenerating a gasoline particle filter of an internal combustion engine is provided in which a value (Q) for a quantity of soot collected inside of the gasoline particle filter and a value (T) for a temperature of the gasoline particle filter are determined. The internal combustion engine is operated in a lean mode when the value (Q) for the soot quantity is greater than a first threshold, and the value (T) for the temperature of the gasoline particle filter is greater than a threshold.