GitLab CI isn't even on the radar. I'd take Actions or Buildkite anyday over the existing offerings. I'd argue the GitLab CI ecosystem is non-existent.
When I talk to Hashicorp or AWS they provide tooling specifically for GitHub Actions. I don't see the same level of vendor commitment when it comes to GitLab. If I'm not going to get vendor commitment I might as well run buildkite which is awesome or even look to something like Tekton for Kubernetes if I'm just doing Kubernetes anyways.