Treatment of Stock at the time of migration from Vat regime to GST Regime

Mam, 

I have stock of Rs 13 lacs as on 30/6/17 as shown in VAT Return of U.P. My advocate filed  VAT Return upto 30/6/17. GST Returns are filed by me only. For the purpose of assessment of VAT Returns of the period 1/4/17 to 30/6/17,  My advocate says that i should have shown  stock of Rs 13 lacs somewhere  in  GST Returns in July’17 .
 I have not filed the GST Trans-1 form since there was no ITC carry forward.
 
 Query-  i) Mam, where Closing stock of 13 lacs as on 30/6/17 will be shown  in GST Returns ? 
ii) Whether disclosure of Closing Stock as on 30/6/17 is required in GST Returns ?
 
iii) Whether Stock details should be given in GST Trans-1 ? 
 
iv) My friend says that stock of 13 lacs as on 30/6/17  should have been  given manually ( if not given through Returns ) to GST  authorities  when GST was implemented because If I don’t give stock amount to them how will they come to know about the Opening stock under GST Regime. So, whether he is correct ?
 
v) Whether I should give stock details as on 30/6/17  for GST purposes to GST officer now ??
 
Thanks a lot ..
Regards.