CloudLinux does not have a specific feature or service called "Gradual Rollout System" that I'm aware of. However, it's possible that they might have introduced this feature or service after my last training data.

If CloudLinux has indeed introduced a "Gradual Rollout System" after September 2021, I would recommend checking their official documentation, release notes, or contacting their support or community forums for the most up-to-date and accurate information on how this system works and how to use it effectively.

Keep in mind that any new features or updates introduced after September 2021 would not be within my current knowledge base, and I may not be able to provide specific details on them.