@Alan Watts - there is no client-side Git plugin for Studio.  Studio works exclusively with server-side source-control hooks.  This is what the git-source-control package on OEX is ... it is server-side source control hooks to allow multiple developers to properly interact with a git repo from a single Namespace within InterSystems IRIS.  So once this is properly installed and configured for a given Namespace, once you connect via Studio you should see new top level Menu items in Studio and all changes will be governed by the source control hooks.  Nothing else is needed to be installed on the developers' Studio instances in terms of plug-ins, etc.

@Colin Brough - the heart of the GitLab integration with HS shown in this video is the git-source-control package which is available on the Open Exchange for you to download and use: https://community.intersystems.com/post/git-shared-development-environments

More details can be found here: https://community.intersystems.com/post/video-git-gitlab-shared-developm...