If you installed your system using the text installer, the system will only be installed with a text interface. Here is how to upgrade to a graphical system.
Do the following as root (su) or with appropriate permissions (pfexec/sudo).
echo Existing boot environments: beadm list echo echo -n Enter be name to create: read be beadm create $be beadm mount $be /mnt pkg -R /mnt install babel_install pkg -R /mnt uninstall babel_install slim_install bootadm update-archive -R /mnt beadm umount $be beadm activate $be
Now, reboot the system to enter the new boot environment. Then enable the GDM service:
svcadm enable gdm
Based on the OpenSolaris Text Installer FAQ.