Garmin Glo Firmware upgrade
I wouldn't even know how to downgrade to an earlier version of iOS (after a newer version has been installed). Neither would I recommend to become a beta tester for iOS 8.4 on the same iPad that I rely on for my flight safety. Who knows what new problems I will encounter...
Although not widely published, the firmware upgrade of the external GPS receiver should fix the problem. I am using the Garmin Glo on a non-cellular iPad (that is, an iPad without inbuilt GPS receiver). The firmware upgrade works as advertised and described by Coger below, and fixed the problem for me.
Last edited by Hot and Hi; 7th Jun 2015 at 18:20.
Reason: spelling