Hi Bruna
Thank you for your reply!
Yes, custom code will be needed to integrate with Gravity Forms, and that is no problem for me.
However, I have been looking at your API, and cannot seem to find a function that enables me to determine the e-mail of the current subscriber visiting the manage subscription page. As far as I can see, the getSubscriber function require me to know the e-mail address of the subcriber.
Best,
Simon