MailChimp subscribe plus create WordPress user?

I need to create a subscription-based WordPress site. I want people to be able to register on the site (for free), then I need the form to a) create a new WordPress user/subscriber; and b) add the subscriber to a MailChimp mailing list.

I want to use the WordPress user accounts to restrict access to certain pages to subscribers only, whilst using a MailChimp list to manage the subscribers details, so that they can be sent email newsletters.

I also want the registration form to include additional fields, such as postal address, with the values submitted to be either saved against the WordPress user account or passed to MailChimp and saved in the mailing list. Ideally, both.

Can Gravity Forms do this?

(I hope all that makes sense?!)

Thanks.

I have this exact situation. My problem is that if someone is already on the MailChimp list, they can't submit my member registration form. THey keep getting an error that they are already subscribed to MailChimp. Is there some way to subscribe new users and ignore previously subscribed users?

Thanks,

Doug Ward