For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:RemoteDesktop:x2go:snapshot/openSUSE_Factory/X11:RemoteDesktop:x2go:snapshot.repo
zypper refresh
zypper install x2goserver
For openSUSE 13.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:RemoteDesktop:x2go:snapshot/openSUSE_13.2/X11:RemoteDesktop:x2go:snapshot.repo
zypper refresh
zypper install x2goserver
For openSUSE 13.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:RemoteDesktop:x2go:snapshot/openSUSE_13.1/X11:RemoteDesktop:x2go:snapshot.repo
zypper refresh
zypper install x2goserver