Thanks for the quick and informative responses! You guys are awesome
@eagle5953 That RGB is insanely intense! Whichever composite converter I decide to go with will definitely be taken out the case and slimmed down as much as possible, so hopefully it won't be that big. But I think you're right on the power issue, it probably will negate any power savings from the LCD.
I looked for hours to find a LCD monitor that accepted RGB/VGA input and the smallest I could find was 7", which is way too big for the GG.
@wallydawg Using this RGB decoder from the link will definitely output a color signal. Thanks for the suggestion to check out SMSPower Forums. I found this http://www.smspower.org/forums/viewtopic.php?t=12954&highlight=game+gear
The background info that goes with this technique is here http://members.iinet.net.au/~stinkyfist/reviletim/ggtv/ggtv.htm
My problem is that I have no idea where to find the PCB for the Altera chip. Plus, I don't know how to program the chip. I'm guessing you need a serial adapter and computer software.