Why so complicated? As a first step Please give me a Deployments Page that gives me the option to run simples SH Scripts in the Runner on click, parameterised please. All I need is a nice GUI for my QA people that allows them to deploy(which for our PHP site basically just means copy and DB Import) Branch x on Server y.

Jenkins is total Overkill for that but GitLab CI doesnt leave me with enough GUI to skip it either.