YES I had it rooted and NO the .apk doesn't work but thank you for the link. Google Play installed fine, but it force closes every single time I try to open it.
Now I'll have to root it and flash some stupid FROYO ROM to it because I'm pretty sure that's where development ended for this thing...
So the Viewsonic support site says that Google restricted the Android Marketplace to devices 7" or smaller for Android 2.2 and the gTablet is 10". So it looks like I am going to be working to get apps on this thing again