gtk4 from home:MaxxedSUSE:Emulators 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:MaxxedSUSE:Emulators/openSUSE_Tumbleweed/home:MaxxedSUSE:Emulators.repo zypper refresh zypper install gtk4
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MaxxedSUSE:Emulators/15.6/home:MaxxedSUSE:Emulators.repo zypper refresh zypper install gtk4