Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:maxiotis/16.0/home:maxiotis.repo
zypper refresh
zypper install GASPware
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:maxiotis/15.6/home:maxiotis.repo
zypper refresh
zypper install GASPware
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:maxiotis/15.5/home:maxiotis.repo
zypper refresh
zypper install GASPware