ZeldaClassic by Armageddongames, a project that started way back in April 1999 as a Legend of Zelda 1 Remake for the PC, is most probably being ported over to the gp2x!
I just sent one of the devs a gp2x today so he can start trying to port it

Today, the project is way more than just a Zelda remake. It features mostly all items from A Link to the Past (and even some of the N64 Zeldas) and it is possible for everyone to create their own Zelda-like games (with their own graphics and sounds) using a freely available Quest Editor.
There are already more than 200 quests available, a lot of those don't need to hide behind any original Zelda game.
If it happens then check out the screens via Comments