Sec 44AD and GST on trading of Onions

Hello.

I have 2 queries regarding applicability of Sec 44AD and GST.

1) Will GST be applicable on trading of Onions by a propreitor or by a firm? (Rate ,registration and Returns).

2) Will the assessee get benefits of Sec 44AD regarding relaxation in maintaining books of account if turnover is less than the limit?

All members kindly give a detailed explanation.

Warm regards.