Gst tran 1 excise credit

My client have exiceable goods in stock as on 30/06/2017,  under pre gst he was registerd under VAT Gujarat, Invoices of the same are available with them but excise duty is  not seperatly given in that bill? How do i cliam that excise? Can i claim or not? If yes than in which table?? 

Please give your view as early as possible.

Thanking you in advance