I don't need to configure anything on the client because when I do a search using this method, I don't find any clients supporting GUP...
1 In the console, click Clients.
2 On the Clients tab, in the View box, select Client status.
3 In the Tasks pane, click Search clients.
4 In the Find drop-down list , select Computers.
5 In the In Group box, specify the group name.
6 Under Search Criteria, click in the Search Field column and select Group Update Provider.
7 Under Search Criteria, click in the Comparison Operator column and select =.
8 Under Search Criteria, click in the Value column and select True.
9 Click Search.
I have a few clients that do indeed have the latest version of 12.4 installed but none of them show up.