Is GPU-P Secure?

i’m working on building a virtualization server and i want to partition the GPU like the LTT team did in this video and how craft did in this video. i want to this in the production environment for a local business because of the obvious lower cost/station. my question is, is it secure? can an attacker run scripting on the host through the graphics driver which is linking the VM to the host. the reason i ask is because when you use GPU passthrough, microsoft recommends installing a “security mitigation driver” here. since GPU passthrough has an obviously narrower window to the hyper-v host (since the GPU is “offline” at the host level) i’m wondering how it comes into play here. any thoughts? would appreciate it.