Actually this tough to simply say. The ACPC uses the sum of 60% of the weightage of the percentile obtained in the theory subjects (Physics, Chemistry and Mathematics) and 40% weightage of the percentile obtained in the GUJCET-to calculate the merit marks. However you can check the percentile here http://www.jacpcldce.ac.in/Adm17/BE/Percentile_GujCET.pdf. Considering the marks in both, you do stand a fair chance of a good seat. 

You can check the cutoffs to know the ranks you need to get for a seat - https://engineering.careers360.com/articles/gujcet-cutoff. After the exam, there will rank predictors available and you can use them for estimating your probable rank in GUJCET for admissions