nvidia-drivers : NVIDIA Accelerated Graphics Driver ( https://www.nvidia.com/download/index.aspx )
nvidia-vaapi-driver : VA-API implementation that uses NVDEC as a backend ( https://github.com/elFarto/nvidia-vaapi-driver/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zGentoo
For Paludis use this rsync : rsync://gentoo.zugaina.org/zGentoo-portage
If you have a problem : ycarus(-at-)zugaina.org