Download iOS 5 GM for iPhone 4, 3GS, iPod Touch 4G, 3G & iPad Direct Download Link
It wasn’t big secret that Apple will be making an announcement about iOS 5 public release and as per our expectations Apple has finally made the announced that iOS 5 will be available for free to iPhone 3GS, iPhone 4, iPod Touch 3G, 4G & iPad 1 & 2 on October 12. Also Apple has made the iOS 5 GM (Gold Master) build available immediately after the event. Though only developers can access and download iOS 5 GM but the checks for registered UDID is missing hence it won’t be problem if you install on your iOS device without having iOS Dev account.
In order to install iOS 5 GM you must have iTunes 10.5 Beta 7 or above in your Mac Or Windows. Also iOS 5 GM is not available over the air and only way to get is by downloading IPSW files respective to your iOS devices.
Jailbreakers & unlockers must stay away from iOS 5 GM build and wait for further announcements from iPhone Dev Teams. You also need to backup your device before attempting to install iOS 5 GM build.
Direct Download Links for iOS 5 GM