This is an example of how to add a GDPR agreement to a form. As per GDPR, this checkbox agreement should have the following:
Always required: This checkbox is always required, and there is no setting option to remove the requirement
No option to check by default: GDPR requires that a consent box cannot be checked by default. Instead, the user must be allowed to choose whether to check the box.
Only a single checkbox: There are no additional checkbox options for this field.