You can add GaiaPro to any device, or restore GaiaPro if you deleted and reinstalled Gaia GPS.
You can either log in with your gaiagps.com account, or restore using your iTunes account.
1. From the menu, Tap Account
2. Tap login in the top right.
3. Enter your GaiaPro email and password.
4. If you don't have a Gaia GPS account, or if you subscribed through the App Store, tap Restore and use your iTunes login instead.