I have installed a new Red Hat Linux ( from the book "Linux Unleashed" )and the G200 card does not work with it.I tried manually to configure ( with XF86Config ) and with rpm and both return a card with runs only 320 x 320 with 64 KB video RAM ( yes , thats what the x-server entry is ). I have also a SuSE Linux and this has the G200 card in the list. So I can only see part of the screen i.e. left hand corner.
The G220 card was not well supported with the XFree86 binaries originally shipped with 5.2. Updates to XFree86 are available from our ftp site at ftp://updates.redhat.com/5.2/i386. Here you will find XFree86-3.3.3.1 and others that will work with your G200.