Just finished installing Google Play on my Fire HD 6", running the latest Amazon operating system (5.1.2). Then, I added Google Maps (using the Play store), did a WiFi tether to my Samsung Galaxy 5, and now my Fire HD has MAPS!!! Great match for the Standard!
Here's the video on how to install the Google services on your Fire HD device:
Tomorrow I'll be plugging this in via micro USB:
Amazon.com: GlobalSat ND-105C Micro USB GPS Receiver: Cell Phones & Accessories
I'll let you know how it works out. Obviously, with my P3S, I will have the cache the maps, as my WiFi will be occupied while I fly. I already opened the Flight Records and it is downloading the maps as I view my old flights. Pretty cool, considering the price, performance, and durability of the Fire HD. Screen works pretty well outdoors, too, no hood.