Almost anything that advances the Pascal game development community, in general, should be a Good Thang ( tm ).

My son has a GBA so I could tell him he's been bad and "conficate" it for R&D . I am kidding of course.

Also it does not matter if you do not have a GBA, as you can use various GBA Emulators ( like http://sdlemu.ngemu.com/basdl.php ) to test out your Pascal GBA code before having to test it on a real GBA.

I would give it a try if an FPC/GBA port was available.