I have
I have the same issue.
SLI here as well, so I am not sure if that's the common denominator.
Well it's very messily implemented at the moment. Installed the win10 creator update, set everything up in the new "gaming" settings section, and could not bring up the gaming bar either on the desktop or in any games using Win + G or my xbox 360 pad central button.
Thanks to the post above I tried "Alt+ Enter" when in a game to take it out of full screen mode, and then tried Win + G and it brings up the game bar! Where on any Microsoft documentation does it say you need to do that!!?
On the game bar settings option there is then a little tick box option to "enable game mode for this game" or whatever it says. You then have to Alt + Enter to go back into full screen mode (I always run fullscreen due to best Gsync and SLI performance).
Couldn't see any real benefits whatsoever in FPS (using rivatuner stats). Tried turning on and off and then wouldn't let me mouse or control any options and had to ctrl alt delete quit out the game. what a load of *****!
I have the same issue.
SLI here as well, so I am not sure if that's the common denominator.