Is it possible to use the integrated GPU for virtualization through GPU passthrough?

My desktop has a GeForce GTX 1060 6GB and since my Intel GPU is not being used at all, is it possible to use my iGPU for virtualization?

I’m planning on setting up a Windows 10 VM using QEMU (or using my already-setup Windows 10 VM in VirtualBox).

Since it’s a desktop, I think it could work. Depends which generation, AFAIK this used to be impossible not too long ago. You’d have to research your board and how your IOMMU groups are laid out. While it’s a great thing to try out, don’t think it’s worth the effort to get anything serious though, the edge you’d get is not that great IMO.