Google Maps is back to App Store for downloading now. For those who keep using iOS 5 for Google Maps now can feel free to upgrade to iOS 6 without concerns.
Google Maps app is not 100% the same to the built-in version in previous iOS. New features are added and bring much satisfactory to users, especially the turn-by-turn feature, that makes much sense to those do not install GPRS in their autos.
It seems the app can not be downloaded succesfully earlier of today, but just now tried to download and can be downloaded without problems.