I have a Gravity Form using the MailChimp add-on. My Wordpress theme uses Zurb Foundation as an html/css/javascript framework. I've put the form into a modal window using Reveal. It displays fine, and it submits successfully.
There are two bugs I have found:
(1) Successful submit lacks a user confirmation action. I've tried both inline message and redirect to Wordpress Page. Nothing. The form just goes blank and that's it.
(2) Failed data validation does not properly show the field errors.
You can view the problem here (at least temporarily, until I close access).
http://dev.madriverlocalvores.org
uid: gravity
pwd: forms
Click on "Join the Email List" in the upper right corner. Double opt-in is activated. So you can simply disregard the confirmation email to avoid being added to the list.
Thanks for any help!