Beware of the first generation ABS system that it might have. It is a very expensive fix if it breaks, and a fairly difficult conversion to non-ABS if you would rather rip it out.
G2IC.com is the end-all place to be for any G2 owner.
They act pretty much like a 3G, except the headlights look 100x better. The factory fogs are a nice touch too. If you care about looks at all, the 92-93 bumpers and taillights have a little more visual appeal then the 90-91 version. Enjoy your "new" G2!