i have 50.37 marks and score 600 in civil engineering

Your marks and score are good. Based on last year cutoffs of gate for IITs you have a great chance of getting admission to higher ranked IITs such as IIT Kanpur, IIT Kharagpur, IIT Varanasi,etc.You can check the previous years cutoffs for colleges on Career360.So, fill the form of CCMT and be careful with the preference order.

Hello Candidate,
Congratulations
You can get IIT based on your marks,score.
You can get IIT Roorkee,IIT Guwahati,etc.
View previous year cutoffs for various IITs and other premier institution, follow the link below:https://www.google.com/amp/s/engineering.careers360.com/articles/gate-cutoff

Note: Careers360 is not responsible for any varies in prediction. Prediction is based on previous year cutoffs.
If you have any questions remain than comment below.
Regards...