I know it is old news for most but I was combing ebay and came across this. The original plastic screen used to bug the F*#! out of me. I put a glass screen like this one in (although I made mine myself) and it REALLY makes a difference. It is really clear and makes the screen look brighter because it doesn't have that blue streaky scratchy crap on it and lets more light in. It is much easier to clean as well because it won't streak and scratch. Trust me it would be the best $7.00 you can spend on your GP32 as it makes everything look so much better, really.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...ssPageName=WDVW
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...ssPageName=WDVW