GitLab Product Manager here - The Codeclimate engine that out CodeQuality feature uses does support about half of the same languages as SuperLinter through plugins that can be added in the codeclimate.yml file. We are exploring how to support the missing languages and add output to the existing and future CodeQuality features.

We have also seen that SuperLinter can be run as part of a GitLab pipeline without too much hassle.

-James H Product Manager - Testing