Apple released iOS 7 Golden Master build to developers today. The GM build is the final, non-beta version which will become available to the public next week, on September 18. Apple iOS 7 Golden Master is compatible with iPhone 4 and up, iPad mini, iPad 2 and later, as well as the 5th generation iPod touch. The update is available for download through the usual developer channels....
Source: http://www.gsmarena.com/apple_seeds_ios_7_golden_master_build_to_developers-news-6767.php