For those of you that are unaware, the GM releases of iOS 4.xx software usually mean that a public release follows soon after – which also suggests that iOS 4.2 will be out within the next few weeks.
Also See: iOS 8 GM, or beta 6 won’t release today
As Engadget reports, iOS 4.2 GM release is for developers only, but if you have a subscription to Apple’s iPhone Developer Program or know somebody that does, then you can also download it if you want to.
It is also a fun time for developers, as they’ll get to preview any new features or hidden tweaks that Apple didn’t announce at their recent iPod Media event.
If you’re interested, you can find the download link over on the Apple website.