The admission committee will prepare the merit list based on 60 percentile weightage over the applicant’s score in Physics, Chemistry and Mathematics in 10+2 (or equivalent) examination and 40 percentile weightage over GUJCET 2017 examination.

40 is very average score in GUJCET and your percentage is also very less in 12th so try to get more score in GUJCET for getting decent college in Gujarat.

To check the top colleges in Gujarat with the best branch you can refer to below link-

http://www.engineering.careers360.com/colleges/ranking/2016/top-engineering-colleges-in-gujarat

To check which colleges and branches you can get based on your marks and rank you can use below college predictor

http://www.engineering.careers360.com/gujarat-engineering-college-predictor