> GoCD

Don't. Just don't.

I'm assuming that the fundamental flaws* of GoCD haven't been fixed, based on the knowledge that in 2015 they (ThoughtWorks) still hadn't addressed them, and I think 5-6 years isn't long enough for them to be addressed.

*Pipelines, as modeled in GoCD, were so inflexible that any kind of flow resulted in having many, many, pipelines configured. To the point that the number pipelines you operate and maintain is actually the multiple of any fork in logic you need.