var imported = document.createElement('script');
imported.src = 'https://apis.google.com/js/platform.js?onload=renderOptIn';
document.head.appendChild(imported);

var orderid = Shopify.checkout.order_id;
var imported_api = document.createElement('script');
imported_api.src = "https://gtsbc.meggnoapps.com/sfy/client/gcs-v3.php?u=&o=" + orderid;
document.head.appendChild(imported_api);