Answered Transport URL parameter using UpdateProfile snippet?

$getParams = array_merge($_GET, array($this->getProperty('successKey','updpsuccess') => 1));
$url = $this->modx->makeUrl(
    $this->modx->resource->get('id'),
    '',
    $getParams,
    'full'
);

$params = array(
    $modx->getOption('successKey', null, 'updpsuccess') => 1,
    'val1' => $_GET['val1'],
    'val2' => $_GET['val2'],
    'val3' => $_GET['val3'],
);
$url = $modx->makeUrl($modx->resource->get('id'), '', $params, 'full');
$modx->sendRedirect($url);