Check-box sign up?

hello,
can I use a Checkbox on sign-up with our plugin?
Like on this site with GravityForms and MailChimp Add-On: https://lindebjerg-design.de/kontakt
The Sign-Up Checkbox called “E-Mail Newsletter anmelden” must be checked to be signed up to the List by MailChimp.

Best,
Jesper