Best output for viewing records in group

I have ‘fees’ model, and ‘office’ model.

In ‘fees’ there is field ‘office_id’, which is a FK in ‘office’.

In FeesController, I have a call to View action, within which I would like to display all the fees records grouped by ‘office_id’.

I’m not sure how to accomplish this using GridView - or if theres a better way to output it. Currently I am grouping them in tables by office_id, but i’m not entirely happy with the way it looks.