well i guess this is as appropriate a time/place as any. Mame, in general, covers tons of ground... there's been a couple notable attempts to make a GP32 port at this point, all of which are quite limited. Also Skeezix's non-mame (arcade) ports.
so what we have seen so far is interesting, but realistically - how far can it go? I would love to see a version playing lots of older games, I mean like pre-1985.. I don't see it happening (but of course what do I know!) Do those in the know have anything to say? Will we ever see something along those lines that's playable in a fashion like OSnes/Gen/etc?
At this relatively late point in the GP32's life, and also the perceived amount of work it would seemingly require, I would suspect it wouldn't happen. But then again.. what do I know. (I had kinda given up on Genesis support a long time ago, anyway...)