you'd have to build your own board to pull the rgb out of a gamegear before you can do anything to improve the screen. it has been
done but it's a giant pain in the butt i'd rather run away.
this was my original playstation, i gave it to my brother several years ago but apparently it stopped working at some point and one time when he got sick he spraypainted it with an angry face. i got him to give it back to me so i could fix it, and while i was in there i changed the power led to red and put a red/green one in on the other side to indicate if the chip was active. but it turned out to be more of an amber/green and it doesn't really match :< whatever it's just a spraystation.