Hello aspirant.

For securing 90 percentile in GUJCET 2020 under the open category your rank would be between 4K-9K. And for that rank, you may not get a computer science engineering seat at any of the 3 colleges. But if you get it then I suggest you go to Dhirubhai Ambani Institute of Information and Communication Technology, Gandhinagar next you prefer Nirma University, Ahmedabad and then go for Maharaja Sayajirao University of Baroda, Vadodara. But you have a good chance to get a seat at CSE in Devang Patel Institute of Advance Technology and Research; Government Engineering College, Rajkot; Sardar Vallabhbhai Patel Institute of Technology, Anand; Shree Swami Atmanand Saraswati Institute of Technology, Surat and many more colleges.

For more information refer to the below link.

Hope this answer helps you.

All the best!!!!!