Yes, I can confirm that it does work with GPT disks. I have 3 Hyper-V deployments, one CSV based and the other two using standalone environments connected to a storage array using iSCSI.
The two standalone are using GPT as they are allocated 3TB of storage each.
EUFI/EFI based systems can boot to a GPT disk, all can use GPT disks as secondary disks.
Yes, yes they have.
Hyper-V is just Windows in this regard. It boots from anything Windows boots from.
Yes, I can confirm that it does work with GPT disks. I have 3 Hyper-V deployments, one CSV based and the other two using standalone environments connected to a storage array using iSCSI.
The two standalone are using GPT as they are allocated 3TB of storage each.