GNOME Desktop Environment as a part of the yum group 'Desktop' underwent serious redesign in its user interface as well as underlying technologies in CentOS 7. The users of the desktop environment need to be educated about these changes before upgrade. GNOME classic user interface is provided in CentOS 7 to lower the impact of this change but the interface still contains several discrepancies from the older version and the users need to be warned about them.
The following packages from yum group 'Desktop' that provides GNOME Desktop Environment were detected to be installed in your system: NetworkManager-gnome control-center gdm gdm-user-switch-applet gnome-panel gnome-power-manager gnome-screensaver gnome-session gnome-terminal gvfs-archive gvfs-fuse gvfs-smb metacity nautilus notification-daemon polkit-gnome xdg-user-dirs-gtk yelp control-center-extra eog gdm-plugin-fingerprint gnome-applets gnome-media gnome-packagekit gnome-vfs2-smb gok orca vino