Hmm
I think it probably runs the Symbian operating system - my Nokia runs Symbian S60, and though it has a built in GPS there's no aviation s/ware that runs on it.
For one reason and another, I've moved onto a HTC PDA which runs Windows Mobile 6 and many options seem to be available. Most casual GA types without a dedicated unit seem to rate PocketFMS which I've tried and seen to work very well, if you can stand the ickle screen.
Cheers
T