Hello Milan, 

Based on your SC rank you can apply for some of the good government colleges under WBJEE. So I would recommend you to apply using your SC rank instead of GMR rank. 

So some of the government colleges where you can apply with higher chances of getting admission.

Jadavpur University

Heritage Institute of technology

University of Calcutta

Kalyani government engineering college

For more information based on your Sc rank you can visit the following website:-

https://engineering.careers360.com/college-predictor-result/50034?s=34745031911529075100

To search for colleges based on your other ranking you can use WBJEE college predictor. The link is provided below.

https://engineering.careers360.com/wbjee-college-predictor

Hope you find this information useful. Have a great future ahead.