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.
Yes there is, if you get an ipad with a sim card. I have a first generation ipad which has a gps and it works well in flight in a cub, running memory map. That is with cellular data turned off, so it certainly isn't using cellphone masts. The gps unit is in the same module as the cellphone unit, is all.