GST registration on F&O turnover exceeding 20 lakhs

I am a full time trader but only trade in cash and pay STCG @ 20%.

I have a small offline business generating around 50k income monthly. The total turnover is around 7 lakhs and so I do not have any GST registration as it’s below the 20L minimum limit.

I was thinking to take some trades in F&O but if my overall turnover exceeds 20 lakhs, will I have to go for GST registration? I really do not want the hassle of filling GST returns every month and hence, avoided F&O so far.

I know GST is not required for F&O but will the combined turnover trigger GST registration for my offline business that’s generating only 7 lakhs revenue?

Kindly reply if you can. Will highly appreciate it.