How to use Randoop and Grails

I have a Grails project and until now I have run some tests using generated unit tests and Selenium.

I would like to use Randoop too, this is a work for college and Randoop is a requirement.

I have been searchig but still did not find any documentation or tutorial about how to use these two together.

Does anyone knows or have experience on this and can help me with a start? Thank you!