For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jnweiger/openSUSE_Tumbleweed/home:jnweiger.repo
zypper refresh
zypper install gimp-blur-gauss-grow
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jnweiger/openSUSE_Leap_42.3/home:jnweiger.repo
zypper refresh
zypper install gimp-blur-gauss-grow
For openSUSE Leap 42.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jnweiger/openSUSE_Leap_42.2/home:jnweiger.repo
zypper refresh
zypper install gimp-blur-gauss-grow
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jnweiger/openSUSE_Factory/home:jnweiger.repo
zypper refresh
zypper install gimp-blur-gauss-grow
For openSUSE 13.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jnweiger/openSUSE_13.2/home:jnweiger.repo
zypper refresh
zypper install gimp-blur-gauss-grow
For openSUSE 13.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jnweiger/openSUSE_13.1/home:jnweiger.repo
zypper refresh
zypper install gimp-blur-gauss-grow