Hello Samson. In Gate 2018, the qualifying marks for M.Tech in life science (XL) was:

• General- 29.9
• OBC (NCL)- 26.9
• SC, ST & PwD- 19.9

Though the cutoff for GATE 2019 will be declared on 16th March 2019 but you may expect a cutoff similar to previous years.

To know about cutoffs of previous years for XL check the link below.

https://www.google.com/amp/s/engineering.careers360.com/articles/gate-cutoff/amp

Hope this helps. For more queries comment down below.

Good Luck!