Last Friday I was messing with KEGS on a PC and decided to see if I could get Wasteland to work. I switched the ROM image it was using from the ROM 1 to ROM 3 and then started it up with the Wasteland boot disk. To my surprise, considering that it wouldn't work on the GS emulators I have on my Mac, it booted up.
In fact I was able to play the game through KEGS. So it seems Wasteland will run on a GS. I need to switch out the ROM image on my GS emulator on the Mac and see if it will work there. This might even make me decide to do brain surgery on my real GS and replace the ROM 1 motherboard I have with a ROM 3 motherboard to see if it works on the real hardware.
I'll update this message tonight after I've had a chance to see if changing the ROM image I use on the Mac makes any difference. I'll even try it on a few different GS emulators on the Mac.