No problem with the internal GPS in the EEpad anywhere in the plane.
Be careful which EEpad you get. The new, just released, Quad Core Asus Transformer Prime has such a poor GPS receiver that they have removed the GPS from their spec sheet. Great tablet with Ice Cream Sandwich but the GPS won't hold a lock standing out in the back yard. This tablet isn't even available in the stores yet and they have announced a new model to correct the WiFi and GPS issues. I have one and love it but I am really disappointed that I will have to use a Bluetooth GPS receiver with it.