You can play via emulation via BBC, C64, Spectrum, Amiga, etc.
The one most suited to the GP2X is probably the emulated NES version as this was designed for gamepads and certain things are icon based rather than trying to map keys to buttons.
Elite 2 for the GP2X works awesomely as I'm always playing on it. Unfortunately I am unable to use my PC save files on this as it does not recognise it.