Re: Calling Another Test Step Groovy script into another Test Case using Groovy.
I'm not sure how you can run individual test steps, but can I suggest that if you want to create reusable functionality you create you create it as TestCases, this way you can use the provided Run TestCase Test Step functionality. I go into a lot more detail of creating reusable functionality in the following two posts;
Otherway, there is no need to call a groovy script in another script as you can have the same script here it self. If you want to achive re-usability, then above is the right way. And you do not have to create the other groovy script step itself.