Controller Action

    public function dummyAction()
    {
        /* @var $fmanager \Zend\Form\FormElementManager */
        $fmanager = $this->getServiceLocator()->get('FormElementManager');
        $dummyForm = $fmanager->get('GsDepartment\Form\DummyForm');
        var_dump($dummyForm);
        exit;
    }