herbfargus
Member
Post count: 1858

bottom of the page:
https://github.com/retropie/RetroPie-Setup/wiki/Game-Boy-Advance

if you are using gpsp press F10 to set up you controls through the menu. you can set up a menu hotkey that will open the menu which you can then exit from. If you are referring to libretro-gpsp or libretro-vba-next they use retroarch hotkeys.

https://github.com/retropie/RetroPie-Setup/wiki/RetroArch-Configuration