RE: Windows Virtual Desktop and GP
The System Requirements for Dynamics GP only mention the following for virtualization:
Windows Server 2019 Hyper-V (18.2.1013 GP version or later)
Windows Server 2016 Hyper-V
Windows Server 2012 Hyper-V
Windows Server 2012 R2 Hyper-V
Microsoft Application Virtualization (App-V) 5.0
So, most likely Dynamics GP has never been tested with Windows Virtual Desktop, so, while it may work, it wouldn't be 'officially' supported if not specified in the System Requirements, like anything else.
Thanks