How to downgrade from iOS 7 GM?

I just installed ios 7 gm on my iphone 5. I want to downgrade back to ios 6.1.4 but the thing is that I can't sync it with my computer because it says I need itunes 11.1 which is only out as a beta for mac. I also heard that I can't get back to ios 6.1.4.once apple signs it off and releases the iphone 5s. Is there any way i can downgrade back to ios 6.1.4 before the iphone 5s is released?

You cany

Put your device in DFU mode and then click shift + restore select the correct Ipsw that us for iPhone 5 is the ios 6.1.4
Please tell if that worked it worked for me have fun