If you go to Girona area, I think a good excurssion would be going to Banyoles (just 15kms. from the City) The vila vella (old town) is very nice to walk around and L´Estany (the lake) is just amazing in all seasons.
If you like good restaurantes there are many in the area: Restaurant L´Arpa (1 Michelin Star) is in the village and just beside the lake there are Restaurant La Carpa and Restaurant Mirallac, among others) You many like to have a look at Banyoles website:
You may like to have a look at these pictures:
You can go to Banoles by bus from Girona: