Does my supplies comes under zero rated, exempted or taxable

I buy Goods one state(Taxable CGST 2.5% and SGST 2.5%) and sell globally to individual buyers. Payments  are received by Paypal or bank transfers.

Is this mode considered as export  and what are my liabilities as a tax payer? 

If not exports am I liable to pay double taxes. I don't charge any taxes from my buyers.

Any inputs would be highly appreciated.