Whether GST applicable irrespective of turnover for selling service through my website

Dineep (Assisstant Manager) (49 Points)

03 October 2017  
I would like to create a website of selling services and will be attached to an online payment gateway. Whether I need to take the GST registration evenif there is no stipulated turnover for GST registration (20 lakhs). If yes, which tax is applicable among IGST/SGST/CGST. Kindly advise.