GST registration Processing time ..

Generally, it takes about 10 to 15 days, but in case of site visit it may be delayed by 10 more days.

As per Rule 9(1) registration is granted within seven working days if no objections raise by proper officer.
As per 9(2) If proper officer any deficiency in application can ask for clarification in this regard & to submit the clarification 7 working days is given.

Note: If you have not opted for Aadhaar authentication then officer carry out the physical verification of business place which is to be done within 30 days. that means the registration is granted after 30 days in this case .