So, you think a very small Modul that communicates via http only, and written in different language then the main project (go instead of Ruby), is a reason that the developers of the main project (ruby, only supported on Linux) should also be able to work on Windows, or even be supported in doing so, cause ~three people need to support the gitlab-ci runner on windows?
Edit: oh, and testing of those gitlab-ci functionalities can easily be done in a VM.