I received a personal message stating that
“At the moment, the Gitlab integration only supports personal projects. Meaning, you’re unable to integrate projects from groups. In full transparency, we likely will not be building on or adding to this integration so I would love to share some alternative options with you!”
I don’t understand why this is the case, as there is clearly a need. The alternative options stated are similar as the ones known, with a very hard to implement Zapier workaround. If this is technically not possible, please state so.