build-in intel devices (all new intel cpu’s have come with a gpu) don’t need an extra driver as that’s usually handeled by the kernel
amd devices have a good opensource radeon driver which will be installed if you have an amd device
https://en.opensuse.org/SDB:Radeon
the propitiatory amdgpu-pro driver is currently available for LEAP 42.3 and not for TW or LEAP 15.0
https://en.opensuse.org/SDB:AMDGPU-PRO
there is an opensource driver for nvidia devices but that one has some issues regarding video acceleration (you need to manually enable it) and 3d acceleration on plasma 5 desktop
there is a good propitiatory nvidia driver for opensuse provided by nvidia see the opensuse nvidia wiki for more info
https://en.opensuse.org/SDB:NVIDIA_drivers