Microsoft Windows Server 2019 supports two graphics virtualization technologies available with Hyper-V to leverage GPU hardware:
- Discrete Device Assignment
- RemoteFX vGPU

More information is provided here: https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-graphics-virtualization

The NVIDIA website contains a listing of GRID certified servers and the maximum number of GPUs supported inside a single server.

Server hardware vendor websites also contain more detailed information on the GPU brands and models supported.