RE: GPS-Guidance
Hi Brian,
Several of the higher-end OSD (On Screen Display) units provide GPS guidance capabilities by using their auto-pilot features. One of the biggest safety features desired by FPVers is the Return To Home (RTH) feature that automatically pilots the model in a reverse path recorded by the GPS whenever the R/C radio signal is lost.
Look in my Skywalker thread (post #2) on this forum for some good places to start. Range Video and Eagle Tree are just a few products to look at.
One example is the [link=http://www.rangevideo.com/index.php?main_page=product_info&cPath=49&products _id=135]RangeVideo OSD[/link] unit for $300. It has an impressive list of features!
Good luck!