Brian:
I am having a similar issue with my LG G Pad 8.3" tablet.
Only Google maps works OK and the GPS Test application says I have 21 satellites with 12 strong ones. I am in my house..
The tablet was locked earlier today and the as I got toward the end of the trip I lost GPS LOCK. Then it came back and then lost lock again. Now at home it fails to get lock with IFLYGPS only. All other GPS apps work fine.
Summary: I have GPS working OK on two GPS test apps and on Google maps and on my phone just next to the tablet., but no luck on the tablet.
I have rebooted the tablet and cleard the cache to no avail. I have uninstalled IFLY and reinstalled and no luck. The tablet has worked in the past.
This has to be an IFLY issue since all the other GPS aps work OK. I had just installed the latest upgrade from Play Store, but I don't believe that is the issue since it failed before I installed the update.
Any Ideas???
John