How about a longpress of 1? Perhaps the real solution is a longpress of 1 (or some other key) followed by another IR code to actualy select what you want to do. I havn't really thought about this too much though.

What I think would be really cool would have having a gpsapp specific remote. Yes, you'd need to have two remotes, but having one approriately labeled that would bring gpsapp to the foregound with any button press would be convenient.

Matthew