GabastonGabaston is a commune in the Pyrénées-Atlantiques department in south-western France.WWW gabaston.frHydrographyGabaston is watered by the Gabas river which flows through the town. The river was known as the fluvius gavasensis in 982.Notable PersonalitiesPiers Gaveston, Gascon knight, favorite of King Edward II of England.