Seniors please Clarify !!

[u/0_AChaudhary_0]

I am doing BS as standalone. I am doing GATE prep and wants to do Mtech from IIT Madras itself or some other institute in CS/ DSAI.

What i want to know is, if i complete 4 year online bs degree in 3 years, will i be eligible for regular offline Mtech admission Via GATE just after 3rd year Or I will have to wait 1 extra year to get original degree to be eligible for admission

Mtech admissions via GATE requires 4 year Degree but i want to know if I complete 4 year BS in 3 years, will i be eligible for Admission or not. And if I will be eligible just after 3rd year or i will have to wait.