Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt6/openSUSE_Tumbleweed/KDE:Qt6.repo
zypper refresh
zypper install gammaray
Для openSUSE Factory zSystems запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt6/openSUSE_Factory_zSystems/KDE:Qt6.repo
zypper refresh
zypper install gammaray
Для openSUSE Factory PowerPC запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt6/openSUSE_Factory_PowerPC/KDE:Qt6.repo
zypper refresh
zypper install gammaray
Для openSUSE Factory ARM запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Qt6/openSUSE_Factory_ARM/KDE:Qt6.repo
zypper refresh
zypper install gammaray