I installed an X desktop on a test server, everything was smooth and it works.
The “minimal desktop” installs 399 packages, using 754 M of disk space (and you need to download 244 M).
Command:
yum groupinstall basic-desktop desktop-platform x11 fonts
To manually start the X windows system:
startx
To start at every boot:
sed -i "s/^id:3/id:5/" /etc/inittab