For me, Linux is a server os and a gui doesn’t belong on a server.
(unless its a vmware server, hense the post on installing gnome)
Here is a one-liner that will add GNOME to your box.
Log in as root and run:
yum groupinstall “X Window System” “GNOME Desktop Environment”
Note: Yum will need to download about 250MB of stuff to install via this method.