The highway AP7 from Barcelona or France: Exit n°5 L'Escala. Turn right after the toll booth, then immediatly left to Viladasens direction. Continue forward for 8 km, Through Viladasens village all the way to Sant Jordi Desballs. Enter the village, then turn right then left and second left. You are there.
3 trains per day serve the French border (Portbou), to San Jordi Desvalls.
The train Paris-Barcelona stops at Gerone, at 20km of Sant Jordi Desvalls, where you can rent a car.
The Gerone's airport, at half an hour of car, deserves daily flights from the major europeans cities. The airpots of Barcelona and Perpignan are a bit more than one hour of car to the village.