Where can I find sizing guidelines for a new GS 2020 server?

We need to upgrade our GS2020 installation (currently SR1 CU05) to a new server. Our current (virtual) machine runs on Windows Server 2012 R2, which limits upgrading the SQL Server to 2017.
To outline the specs for a new virtual machine, I'm looking for sizing guidelines (type of processor, no. of cores, RAM, etc.). Any suggestions welcome - thanks in advance!

Kind regards,

Ralf