Keep in mind GitHub Actions is actually like 5 different products. So are you asking for the webhooks/events implementation, the runner orchestration implementation, the runtime image, the secrets storage implementation or the marketplace? All of these could theoretically be disparate components. GitLab gives you everything above but the marketplace
GitLab CE has the runner implementation baked in.
Keep in mind GitHub Actions is actually like 5 different products. So are you asking for the webhooks/events implementation, the runner orchestration implementation, the runtime image, the secrets storage implementation or the marketplace? All of these could theoretically be disparate components. GitLab gives you everything above but the marketplace