It would be easier if you could tell us more about you difficulties.
If your difficulties are that you cannot run two GP instances concurrently because you don’t have a multi-client ASIO driver, the issue is indeed related to Windows and you audio interface driver that has to be multi-client which is not the cas for all audio interface driver in Windows. But again, we don’t know if this is your issue and in this case which audio interface you own. IF this is your issue, this could help: