Hello aspirant, since you have not mentioned which branch/course you want to pursue further, therefore I can only help you with the previous year's cut offs. And you have to analyse them on your own, to evaluate your chances of getting into IITs.

Following are the links to previous year's last cut off patterns:
1. IIT Delhi - https://engineering.careers360.com/articles/gate-cutoff-for-iit-delhi

2. IIT Madras -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-madras

3. IIT Bombay -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-bombay

4. IIT Kharagpur -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-kharagpur

5. IIT Guwahati -
https://engineering.careers360.com/articles/gate-cutoff-iit-guwahati

6. IIT Kanpur -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-kanpur

7. IIT Roorkee -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-roorkee

8. IIT Hyderabad -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-hyderabad

9. IIT Indore -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-indore

10. IIT BHU -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-bhu

11. IIT Jodhpur -
https://engineering.careers360.com/articles/gate-cutoff-iit-jodhpur

12. IIT Mandi -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-mandi

13. IIT Gandhinagar -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-gandhinagar

14. IISc Bangalore -
https://engineering.careers360.com/articles/gate-cutoff-for-iisc-bangalore

15. IIT (ISM) Dhanbad -
https://engineering.careers360.com/articles/gate-cutoff-for-iit-dhanbad

Now, you can atleast predict this year's trends.
To get a more accurate prediction, visit the college predictor link given below:
http://bit.ly/2J9S0MN

All the best!
I hope this helps.