Close fancybox on submit and redirect parent page

I’m using Gravity forms for a fancybox popup here- hit the ‘JOIN’ button and you’ll see the popup. What I need to do is close the popup when the submit button is hit and then redirect the parent page to a specific url. I cannot wrap the submit button itself in a link because I’m using Gravity Forms. Is there another way to do this?

In Prequalification Form | PM Community, you are using some form.
Add target=“_top” to form tag, after filling the form if someone clicks submit button, then it redirects to form action page.

Or you need to redirect it to different than form action page?

The problem is that I’m using Gravity Forms plugin and I cannot add to the submit button link.
When the user hist submit in the modal window, I’d like it to close and have the parent page redirect to the join page