I am trying to install GNOME on a fresh RHEL install. I understand that this can be done with the initial install but it was over looked and now need to install it to register it with the activation code. Is there another way to activate the OS without the GUI??

This is what I receive...

[root@localhost ~]# yum groupinstall "X Window System" "GNOME Desktop Environment"
Loaded plugins: product-id, security, subscription-manager
Updating certificate-based repositories.
Convoy
| 1.3 kB 00:00 ...
Setting up Group Process
Warning: Group X Window System does not exist.
Warning: Group GNOME Desktop Environment does not exist.
No packages in any requested group available to install or update

It looks like you failed to install X Windows (a pre-req) prior to starting the gnome install. You have probably left off some other groups and packages that normally get installed automatically during setup. you probably need to do a yum grouplist and see if the following groups are installed. If not, then do a yum groupinstall <groupname>

Desktop
Desktop Platform
Fonts
Graphical Administration Tools
X Window System

- Alan

Just looked at your post a little more and yum is complaining that it cannot find the groups. What repos do you have defined?