Custom: Gravity Forms ajax submissions

gravity-form.php

<?php
/**
 * Simple file to help add manual entries to a gravity form, so we don't have to deal w/ GFs output.
 */

require_once $_SERVER['DOCUMENT_ROOT'] . '/wp/wp-load.php';

$data = $_REQUEST;

// -----------------------------------------------

$form = GFAPI::get_form($data['form_id']);

# Build our entry
$entry = array();
$regex = '/^input_([0-9])_([0-9])$/';

foreach ($data AS $key => $value):
    if (preg_match($regex, $key))
        $key = preg_replace($regex, '$2', $key);

    $entry[$key] = $value;
endforeach;

$entry['date_created'] = date('Y-m-d G:i');
$entry = GFAPI::add_entry($entry);

if (is_wp_error($entry)):
    die(json_encode(array(
        'error' => true,
        'msg' => $entry->get_error_message(),
        'form' => $form,
    )));

else:
    if (class_exists('GFMailChimp')):
        $mc = new GFMailChimp;
        $mc::export($entry, $form);
    endif;

    GFAPI::send_notifications($form, $entry, 'form_submission');

    die(json_encode(array(
        'error' => false,
        'msg' => end($form['confirmations']),
        'form' => $form,
    )));
endif;

Thanks for this code.
But I dont have any idea how to call this file on my JavaScript?
I have array as entry object variable in javascript file. I would like to send this variable to this file.
Can you plz provide me some hint?

For anybody looking for the aswer in the future. The hint is Wordpress' AJAX call for excecuting server side scripts and getting back answers.