There's no need to unless the build number of the release has changed from the GM.Is there a special way to upgrade from iOS 6 GM to the official release today?
Where can I find the build number? I believe I know where it is, but it never hurts to be sure or to ask.
Settings>> General>> About>> scroll to Version... mine says 6.0(10A403)
even if the build is different, you don't need to restore unless you have any problems... you can always update to the regular version next time around and you should be at par with everyone