A simple vnc server for the gp2x. Make sure you have network working. Then telnet and launch vncserver2x in background ("./vncserver2x &"). You can also put this in a script and return to the menu.
Then start a VNC viewer to the gp2x ip address. You should see your screen on your pc. This will work on most programs (that use /dev/fb0), some programs won't work (eg mplayer, ...).