I can’t seem to make this work for Google Drive. It could be a limitation of Windows, but you should keep in mind that another product for Dropbox exists that allows easy individual folder syncing which is called Boxifier, and this is even with network drives. (Last I checked anyway.)
I was strongly considering moving from Dropbox to Google Drive because the latter is so much cheaper, but it seems so restrictive it’s insane. Why anybody would consider the 1TB+ options when the vanilla version doesn’t allow any freedom is beyond me. Alas, Dropbox Pro is also expensive, so I’m stuck here. If you have a workaround for network drives I’d appreciate that. You see, I have a NAS. The drives on my actual computer pale in comparison.