Import OSDeploy GPOs
The OSConfig repository you downloaded includes some sample Group Policy Objects. These are GPO Backups (not copies from Sysvol).

Create and Import OSDeploy GPOs

In Group Policy Management, create a new GPO. In my example I have created OSDeploy Branding. Right click on the OSDeploy Branding GPO and select Import Settings
Select the OSDeploy Branding GPO from the OSConfig Repository and import it


Repeat this process for OSDeploy Win10 and OSDeploy Win7 and you should be ready to start editing the GPOs