Watch a nice and useful video (we found in LambdaTest channel):
How To Migrate From Jenkins Pipeline To GitLab CI
You may be in a situation where your team is already using Jenkins pipelines to facilitate CI/CD.
This means that you already have pipelines defined,
so you need to convert those Jenkins pipelines into their GitLab pipeline equivalent
while taking advantage of GitLab’s most useful CI/CD features before migrating any of your
pipelines you’ll need to understand some key differences in how these tools facilitate CI/CD.
In this tutorial (39 min) you’ll see how to migrate to GitLab CI/CD from Jenkins pipelines
