I've just spent frustrating hours trying to get stock or GPE running, on my GSM device that's been happily running CM11 for a while. This in part because I'm running Linux and there's no way to get mfastboot running I guess. Tried under Linux Wine but no luck.
Only after grabbing a windows PC and messing around a bunch have I been able to get CWM re-loaded after a partial install of GPE; The GPE recovery flashed OK but /system failed.
On other popular phones, there have always been flashable ZIPs of stock derived, and GPE derived ROMs. So I could keep custom recovery and easily switch ROMs, in order to test my apps.
If there are no such solutions for MotoG, I'll just have to stick with AOSP ROMs I guess. Is there some technical reason, or just not enough dev interest in ZIP flashable versions of stock and GPE ?
Thanks for any thoughts !