Here's a cool physical "hack/mod" from one of our sister-sites. A member (username fjk) of PRCForum.com felt that his Polaris XP 1000 All Terrain Vehicle (ATV) was missing an active GPS system. Rather than just whine about, he decided to do something about it! He decided to create a physical mount for his iPad Mini so that he could use the X GPS app for his purposes. This particular setup is perfect because this app doesn't require cell service.
There are several more pics included in his thread to showcase how he "macgyvered up" his own personal GPS. Be sure to check them out at the source link below. It seems that old adage "necessity being the mother of invention" rings true for some!