How can links on websites be made to lead to, firstly, a location in the new Google Maps for iOS app, and if not available, revert to Apple Maps?
Currently, the default functionality is that a link to
I do not think a single URL is going to be able to do that.
The Google Maps for iOS uses the
And the Apple Maps app uses
I think the best you are going to be able to do is give the user the choice, or just run with Apple maps since you'll know it's there (if there user-agent is iOS 6).