Input vs out put gst treatment

Yes , If fact Input CGST and SGST Tax credit are Your Current Asset should be shown on Asset side in Balance Sheet, and Out put CGST and SGST Tax are your liability to pay .
At the end of the year , if any balance in Electronic credit ledger ( ITC ) should transfer to Balance with Revenue Authority A/c , Should be shown in Asset side.

Great. So CGST debit from purchases entry is a current asset and CGST credit from sales entry represents a liability.. in the year end before paying taxes, we do output minus input cgst and that's current tax payables. When ITC = tax payable (output gst - input gst) why is ITC under current assets?

Operating period of an Assets, usually within one year will be treated as Current Asset, So Input Tax credit which is benefit to business may or may not be available at the end of the year but it's Asset to business for current period, so it's current Asset .

I have seen  lots of  business  entitles showing  Input CGST , SGST and IGST  under  Duties & Taxes  , Lability side Balance sheet , May not be correct  , but useful for Calculation .