It has a wider feature set and is just generally easier to use. When I had to set up GHA I was constantly surprised with how hard some very basic things were that were trivial with GitLab CI.

GHA was based on Azure Actions, which was never intended as a CI system nor meant to be used in a context where actions could be malicious. So it's the wrong tool for the job that had to be adapted to fit another use case, straying from its original design principles to make it work.

Thanks for responding, but unfortunately it’s still too vague to agree or disagree with.