My website is using Gravity Forms for an advanced web form. I am also using mailchimp for SMS Automation marketing. I am trying to get the submissions opted in for SMS but Mailchimp tells me there is not way to do it unless I use their pre built forms. That wont work for me since my form has advanced fields.
How can I get people who submit my gravity form opted in to SMS Automated marketing? The SMS messages are time delayed to go out every couple days until the sequence is completed.