Hi Subham, the cutoff varies every year based on various factors like number of seats available number of test takers difficulty level of the exams etc and category of student. However going with the past records, you have very high chances to crack through almost all PSU calls. 

1) A A I 

2) BSNL 

3) NPCIL - except general category 

4) HAL 

5) BHEL 

6) CEL 

7) NTPC - very high chances 

8) HPCL 

9) NLC 

10) Power Grid 

11) ONGC - except general category 

You have high chances in almost all the above mentioned PSUs. you can refer to this link below, to hsve a detailed knowledge on cutoff for all psu in various category, 

https://engineering.careers360.com/articles/what-are-gate-scores-for-psu-recruitment

First of all congratulations for your great score in gate exam.You can get call from both ntpc and bhel as per your score.You can also check your possible psus as per your rank in careers360 college and PSU predictor section.By that you will be sure about your possible PSUs.Best of luck.