tour operator hotel input

sir I think you should consider your invoice... if you are charging entire amount in same invoice that means you are providing hotel service I think in that case you should charge SGST and CGST..
and if you are charging only commission then I think you can claim ITC and charge IGsT.. and your client can take ITC

I charged entire amount with my margin from my client should I show cgst and sgst in my invoice or igst

I think in that case you are making a supply of hotel service
.. hence I think you should charge SGST and CGsT