function add_ghl_form_tracking_script() {
    ?>
    <script type="text/javascript">
    // Paste the tracking script here
    (function() {
        document.addEventListener('DOMContentLoaded', function() {
            // ... rest of the script
        });
    })();
    </script>
    <?php
}
add_action('wp_footer', 'add_ghl_form_tracking_script', 100);