Well at least for Nvidia, vGPU is a fully Enterprise tech for accomplishing splitting a GPU between a host and VMs. It also just so happens to work on all 20> series cards if you patch the driver :}

Specifically to set up a system like the one I've finally got. A hypervisor that retains its own display capabilities, while being able to share the full GPU (though only set portions of VRAM) freely and on demand, with a VM. We can shit on Nvidia all we'd like for a lot of stuff, but vGPU works really well, even on cards it isn't meant to support LOL