Using Gravity Forms, we need to set up the form to do an HTTP POST to a specific URL. Use the gform_post_submission hook (which fires after the form has been processed), gather the form data and write code (a few lines of PHP) to send the data to the 3rd party URL.
Additional Project Description:
03/01/2013 at 20:29 GMT
Here is the documentation for gform_after_submission: