functions.php

<?php
add_action('gform_after_submission', 'post_to_third_party', 10, 2);
function post_to_third_party($entry, $form) {
    $post_url = 'http://forms.franklin.edu/newsletter-registration/Register';
    $body = array(
        'fullName' => $entry['1.1'], 
        'email' => $entry['1.2']
        );
    $request = new WP_Http();
    $response = $request->post($post_url, array('body' => $body));
}
?>