Hi,
Firstly, please format your posts in the future, as described here: Community, first steps: Code, config, log block formatting in topics and replies
Secondly, this looks to me like a generic build issue, related to Android / Gradle build and has nothing to do with GitLab. You should google the error and see why is it coming up (if the build works locally of course, otherwise you cannot expect for it to work in CI either).
Also, what I would suggest you is to pin the version of the image you’re using: reactnativecommunity/react-native-android means it will always grab “latest” which is quite unstable and from my experience, Gradle is super sensitive about SDK changes. So make sure you are using the correct SDK version here. Available tags you can always find on project’s pages / DockerHub.