According to a new rumor, iOS 7 Beta 7 should be available today. If previous speculation is accurate we are very close to the Gold Master.
The timing seems about right if the September 10 time is accurate.
Gold Master is the version that usually arrives to developers as the release that will become available to the public. In other words, GM is the final, “this is iOS 7” build. Unless anything is terribly wrong that can’t just be fixed in a simple patch, expect it to be the version of iOS consumers get.