I think that if you want to link with Google you have to find an emulator or another phone. Install the normal app and link to Google and Facebook. Once linked, you go back to the modded app and you'll see that you're linked to Google and Facebook. Normally it shouldn't change much for us who use a mod, the only problem will be in case of a change of phone. As long as they don't do like the Japanese version, we're safe!! I tried what I put above and well it works, now on the mod I have linked to Google and Facebook which is displayed!!