Technically, you don't need GPS for location tracking. All you need is to scan for BSSIDs around you and then check in a database, where in the world they are.

Technically, you don't need GPS for location tracking. All you need is to scan for BSSIDs around you and then check in a database, where in the world they are. Conveniently, Google has one such database ;). (That's also the reason why Android gates wifi network scanning behind location permission).