I spent days searching for the Suspend option in my new CentOS 7 installation.
Well, I finally found it, but it wasn't as easy as you'd expect.
First you need to install a couple things:
$ sudo yum install gnome-shell-extension-alternative-status-menu gnome-tweak-tool
Next, log-out and log back in.
gnome-tweak-tool to enable the fancy new extension:
And there you have it; a menu that Windows has had by default for a decade.