I really disagree with relying on GPS to learn how to get yourself so you know where you are... it's just such bad practice... What do you do if your instruments fail? Or your GPS packs in? Learn the other methods... it's better to have them under your belt rather than relying on a piece of equipment that might break on you. Also, not all planes have GPS.. so if you find yourself wanting to rent an airplane are you going to say to them, "oh it doesn't have GPS, i might get lost..."
