Install this plugin: GDPR Compliance for Mailchimp
And you don’t need to activate GDPR from Mailchimp.
Is a add-on for Easy Forms and it will appear as a tab “EU Law Compliance” inline with tabs “Form Builder”, “Form Settings”, “Custom Messages”.
In “Compliance Checkbox Consent Text” field you can add this “I accept terms…” and you can link a specific word or text in this field.
I discover that you must add all the fields you need in signup forms section in mailchimp. After that all the fields appear in easy forms/opt-in forms in your dashboard and you can choose any of them.
You can resubscribe a person that was permanently delete using your SignUp Form URL from Mailchimp account, looks like http://eepurl.com/hZzf_X. You find this URL in Form Builder section.