There is no gps cheat. They do not replace a map and compass. A map shows you terrain, water, valleys, funnels, ridgelines...
Five minutes with a map and you know more than two days random wandering- not that you dont need to hoof it. It lets you plan your hoofing. I do use a gps for plotting stand sites, distances, etc. but it is no where near as helpful or versatile as a map and compass...especially once the batteries die, or it doesnt triangulate due to steep terrain or tree cover.