There are leaks developing Google Maps for iOS 6. The developer Ben Guild on the blog post photos early stages of the Google Maps app for iOS 6.
In this development they are currently working on major improvements on application maps and bring all the features previously available on Android phones. In addition, Google Maps will use vector-based images like the Apple Maps. By using this vector will speed up the process of loading and reduces data usage.
Google Maps will look beautiful on the screen of the iPhone 5. It is not yet known when Google Maps will be available in the App Store for iOS users 6. We wait for confirmation from Google on this.