Hi,
Im thinking about upgrading purely due to impatience. Ive read online that the GM is the final version, does this that if i install it i won't have any issues backing up to iCloud and continue using my iPhone as normal?
Go ahead and give it a try. The nice thing about installing now is you can revert back to iOS 7 if you find something you don't like. Once the official version drops this becomes impossible.
I'm back on 7.1.2 after using the GM for a couple of days due to battery life. It's insane how much of a difference there was on my 5s.