For openSUSE Tumbleweed pure run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:StefanBruens:branches:science/openSUSE_Tumbleweed_pure/home:StefanBruens:branches:science.repo
zypper refresh
zypper install gmsh
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:StefanBruens:branches:science/openSUSE_Tumbleweed/home:StefanBruens:branches:science.repo
zypper refresh
zypper install gmsh
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:StefanBruens:branches:science/openSUSE_Factory_PowerPC/home:StefanBruens:branches:science.repo
zypper refresh
zypper install gmsh
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:StefanBruens:branches:science/15.6/home:StefanBruens:branches:science.repo
zypper refresh
zypper install gmsh