Does Growform have a calendly integration?
Although Growform doesn't have a Calendly integration per se, Growform customers often do send customers to a Calendly link as a final step of their form.
One option is to use our "Link" button field to add a link to your ending (the thank-you screen your users see on completion):

Or alternatively, you can redirect all users to your calendar booking page with a redirect ending. Open the step dropdown in the top-left of the builder, hit "Edit steps & endings", then hit "Add ending", choose "Redirect" and enter your Calendly URL:

Bonus tip: flip on the "Send query params" toggle at the bottom of the Endings section to pre-fill Calendly with the user's name and email.