How much cut off marks for general category

Dear Bannuru
The following factors will be taken into consideration during the preparation process of cutoff of GATE 2018:

Number of seats offered for each M.Tech programme

Total number of applicants for the course

Previous Year Cutoff Trends

Level of Difficulty of Questions in GATE 2018
If you haven't mentioned any branch,  so it'll be almost 25 marks and if you want the correct cutoff..
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All the best.

GATE Cutoff 2018: The qualifying cutoff of GATE 2018 will be announced by the IIT Guwahati along with the result on March 17. The released GATE 2018 cutoff will consist of the minimum marks that the candidates will have to secure to qualify the examination. M.Tech aspirants can check the GATE cutoff 2018 on this page to know the minimum score that will allow them a chance of admissions at the IITs, NITs and other leading institutes. Candidates must also keep in mind that the GATE cutoff 2018 will be separate for qualifying and admissions. The authorities of each institute offering M.Tech admissions through GATE will also be releasing their individual GATE 2018 cutoff. Since no common counselling is offered, each institute will be determining their GATE cutoff 2018 to screen admissions into the offered M.Tech courses. The candidates will be termed as qualified based on the prepared cutoff of GATE 2018. A variety of factors will be taken into consideration by the concerned authorities during the preparation of GATE 2018 cut off. For admissions into the institutions offering M.Tech courses, the candidates will have to meet the set cutoff or score higher. The candidates should note that the cutoff of each institute, course and student category will vary. The GATE cut off 2018 for IITs, NITs, etc. will be available once the admissions are announced. GATE 2018 cutoff will also be used in various PSU recruitments. In the meantime, candidates can refer to the cutoff from the previous years to get an idea of what to score in GATE 2018.
For more details visit below link:
https://engineering.careers360.com/articles/gate-cutoff