The nearest I see is Palafolls but it seems to be ultralights only; check
Inicio - PRAIR Aviació
A bit further off, in the same direction, is the Club Aeronautic Catalunya, in Hostalric. They too are (at least mainly, perhaps even exclusively) in ultralights.
Still further off, but a very scenic ride, is Ampuriabrava (also spelled Empuriabrava, that is the somewhat delicate difference between Castilian Spanish and Catalonian).
Last but not least, I suppose you should be able to find an aeroclub at Gerona/Girona airport which is not very far off either.