Vulkan support is built into the driver as far as I know, and the NVidia driver is bit-for-bit the same for all operating systems.
Also see Does FreeBSD support Vulkan?
And, http://www.geeks3d.com/20160321/nvidia-r364-12-for-linux-with-vulkan-support/
Also see Does FreeBSD support Vulkan?
And, http://www.geeks3d.com/20160321/nvidia-r364-12-for-linux-with-vulkan-support/