How can I tell if an iOS device has a GPS?

Question

For an iPad, or iPod touch, is there a way to find out if the device has GPS?

Extra Credit: What if the iPad itself does not, but it is connected to a third-party GP

Answer 1

For iOS 6 or higher, you might want to try

+ (BOOL)[CLLocationManager deferredLocationUpdatesAvailable]

According to the documentation:

Deferred location updates require the presence of GPS hardware and may not be supported on all iOS devices.