WSUS installation

Good Afternoon,

I'm new to WSUS so bear with me. I recently installed and configured the Administration Console and created a new GPO object in Active Directory. I configured automatic updates and set the intranet update service

I'm unusre of how to add computers to the WSUS server. From multiple computers I've ran the command wuauclt.exe /detectnow but nothing happens.

How do I add computers to a GPO group?

Thanks

Jason