after you installed gnome dod you edit
/etc/rc.config.d/desktop
and change the line:
DESKTOP=CDE
to
DESKTOP=GNOME
?
or you can use the following command
/usr/sbin/ch_rc -ap DESKTOP=GNOME /etc/rc.config.d/desktop
once either is done issue the following command
/sbin/init.d/gdm.rc start
if you get a message stating that gdm is already running use the following commands:
/sbin/init.d/gdm.rc stop
/sbin/init.d/gdm.rc start
All paths lead to destiny