Mark Gurman, writing for 9to5 Mac:
Following today’s iPhone and iOS Apple media event, Apple has provided developers with the Golden Master (GM) build of iOS 7. The build is available for iPhone 4 and later, iPad mini, iPad 2 and later, and the 5th-generation iPod touch.
The public release is set for next Wednesday, September 18.
I’m very excited to hear this news. I have something I’m working on that will be aided greatly by using iOS 7 on my iPhone 4S for a few days until my new 5S (in Space Gray) gets here.