GJ controls access to its group forums without creating ACL. That's just built in functionality for GJ Forums integration. See the below video on how to setup GJ Forums.



What you are doing is not scaleable. If you end up with 1,000 groups even that's 1,000 usergroups. You will cripple your site as ACL is used heavily everywhere.

It's not about 1,000 users. You're wanting to create a usergroup for every GJ group created. If you've 100 groups that's 100 usergroups. That's a lot. ACL should be kept as minimal as possible outside of the defaults as ACL is used absolutely everywhere. At any rate I believe I've given ample warning of the performance issues this can cause.

Just let GJ control access to its groups. There's no need to use ACL to do that. Watch the video and configure Kunena and GJ accordingly. Next create categories and groups in GJ and it'll create the corresponding categories and groups in Kunena. If you already have categories and groups in GJ then simply resave them and it'll create their forum categories. Active users in the group will have read and write access to that groups forums. Category forums are ACL driven based off the view access level of the GJ category.

Aside from that I don't have anything further to advise. It's a bad idea to load up ACL with unnecessary groups. It will not scale performance wise. You can still do it if you want, but you need to be strict on how many usergroups you have it created.