Gravity Forms Quiz Add On + Mailchimp

I have a client who would like to use Gravity Forms and the Quiz Add-on, but then add those users to a Mailchimp mailing list. How would he do this, and would he need to use Zapier to do it?

Why not use our Mailchimp add-on to send them there after they submit the quiz?

The Mailchimp add-on is available to all Gravity Forms license holders.