does a rear view mirror from an IS fit on a GS and is the compass compatabile ?

 

How are you/did you get a IS rear view mirror? They are glued or sealed on to the front windshield... I don't know how you'r gonna put it back on, but if you are succesful, i'm sure you can hardwire the rest (compass, auto-dim).

Here is a picture I found of what the mirror plugs into. If your harness for the GS looks the same, I'm guessing it might be compatible.
http://img82.imageshack.us/my.php?image=dsc00003cd0.jpg