GraphicsMagick from home:pgajdos:magick project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:pgajdos:magick/openSUSE_Tumbleweed/home:pgajdos:magick.repo zypper refresh zypper install GraphicsMagick