To add one of the dozens of map sources offered in Gaia GPS to your account:
1.Open the Layers menu
2.Tap “More Layers”
3.Choose a category based on the type of map you need by tapping on it
4.To add and remove sources on your layers list, tap the green and white toggles. Sources added to the Layers list show green.
5.Once you've toggled a source ON, tap on it in the layers list to load it in the main map screen.