If you want to use the gps to map wifi locations found by kistmet then use gpsmap.
Thank you for pointing this out, but IIRC, gpsmap can't show a map in real-time, it only creates the maps after having read the net and gps data from kismet.
My primary use of GPSDrive would be for GPS navigation... having APs automatically add to the map is only for the "show off" factor.