Just use the p920 version for GB. That's what I'm doing and it seems to be just fine. Camera works in 3D you just can't view them.. If you want you can even go into the build.prop and change it back to p925 so it shows correctly. I haven't bothered to do so and as you can see it thinks its a p920.
Sent from my LG-P920 using xda app-developers app
Sent from my LG-P920 using xda app-developers app