Girona

Girona is a city in Catalonia, Spain.

Heading north to France

From Girona Airport, walk east from the airport, under the AP-7 road and on a bit more until you get to the A-2 motorway. This is a toll road so you will have to sneak past the toll operators (which is easily done with a little strategy). When you actually get onto the motorway, you will only need to walk about 1km north before you get to a petrol station. From here you should easily be able to find people driving to France or beyond.

Heading south to Barcelona

Walk south on Carrer de Barcelona (which is a major road running north-south through the city) until you see a Repsol petrol station (http://goo.gl/maps/hZOj) on the right-hand side, just before a round-a-bout and very close to a Decathlon sports shop. There's space for cars to stop if you hold a sign along the road here, as well as the option to ask drivers at the petrol station.

If you're going to Barcelona and can only find a car going part of the way, I recommend trying to stay on the A7 motorway (peage/toll road) instead of the coastal road, because most cars driving longer distances stay on this road as it's much faster. You can find a free city map in the tourist office in Girona.