I recently installed 'gk_news_J!30.zip
Template package only, to be used in an already installed Joomla! website. '

and set up user group permission and also set the K2's parameters from backend but items are still not able to be shown on front end..

please anybody help to sort this out

Thank you

Hello Jwon,

Did you set up your menu items correctly? It sounds more like a setup issue rather than a permissions one.
Also I am sure the template developer will be able to assist you.