How to make self hosted GitLab GDPR / DSGVO compliant?

Hello Forum,

is there a guide on how to make your self-hosted GitLab instance GDPR / DSGVO compliant?
I am especially interested on how to fulfil the Art. 30 “Records of processing activities” requirements.
I had no success with the documentation so far and the search engine results had no answers as well.
If anyone has some expertise and knowledge to share i would be very grateful.

Thank you very much and have a nice day!