By default, the Domain Administrators have pre-staged ten site specific Group Policies in each organizational structure. These Group Policies are used as templates for a site to create local custom GPOs. Documentation on working with pre-staged GPOs can be found at editing a pre-staged GPO using AGPM Console. To request new Blank GPOs for your OU: submit a ticket through the Service Desk requesting new blank GPOs and include your specific OU name.
To have a WMI filter attached to an existing GPO, submit a ticket through the Service Desk. WMI filters can only be added to a deployed GPO by the Domain Admins.