At the end Gaia is a task scheduler. You can compare it with AWS stepflow but also with Jenkins/CircleCI/TravisCI/Bamboo/Codeship and many more.

In my opinion Gaia is perfect for programmers which are "forced" to write automation tasks. It allows you to write automation tasks in your preferred programming language and makes it super easy for you to schedule them because Gaia comes with an automatic build feature (just provide the git url of your source code and Gaia does the rest). Additionally, Gaia is super fast, lightweight and open-source.