How to get all users from group ServiceNow ?

var getUser = [];
           var gUser = new GlideRecord('sys_user_grmember');
          gUser.addQuery('group.name', "helpdesk");
          gUser.query();
           while (gUser.next()) {
                    getUser.push(gUser.getValue('user'));
          }
          gs.print("getUser="+getUser)