I'm Oleg, maker of McPiper. I've built it to help me monitor GitLab pipelines. While coding I don't look at my emails and I was missing failed pipeline notifications.
McPiper is macOS app that lives in the status bar and when a pipeline fails it will highlight it in red and will show the notification.
Let me know if you have any questions or comments.
I also plan to add GitHub Actions soon. Let me know if you like to see any other CI / CD tool.