Okei
let me get this straight: I have windows, i downloaded IOS 7 GM and installed itt, now it says that my phone cant be used, does that mean i now have IOS 7 GM? Or does it mean that i screwed up?
If your phone is working, it can be used .. however, you CANNOT sync it anymore without iTunes 11.1 !!
Restoring backup from iCloud will work fine though