There is no GPS (as we all know it) in an iPad or iPhone. They call it assisted gps and it is just autotriangulation from cellular network masts.
Get the proper (swipe) bluetooth gps, the GNS 5870 MFI, you'll love it.
I can't imagine going back to "just" the twin dash mounted GNS430s in the PA 28 I fly. Memory Map on the New iPad (it's not called the iPad3) is fantastic.