Grails GSP Loop through an index and do somthing with selected lines

In an Index-gsp, I want to be able to select an arbitrary number of lines and then by clicking a link send all those lines to a controller for processing e.g. creating new objects of a different kind.

I've no idea how selection can be done or how to collect these selected lines in a GSP. Maybe I should use a checkbox on each line if that's possible?