For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/graphics:gimp3/openSUSE_Tumbleweed/graphics:gimp3.repo
zypper refresh
zypper install gimp
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/graphics:gimp3/openSUSE_Factory_PowerPC/graphics:gimp3.repo
zypper refresh
zypper install gimp
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/graphics:gimp3/openSUSE_Factory_ARM/graphics:gimp3.repo
zypper refresh
zypper install gimp
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/graphics:gimp3/openSUSE_Factory/graphics:gimp3.repo
zypper refresh
zypper install gimp