Both JIIT Guna and JIIT Noida offers admission based on the 12th percentage and JEE MAINS exam result. You must be qualififying in atleast one of these two criteria in order to get a seat.

If the student has a minimum of 60% or more in the 12th with pcm, he or she can get admission in JIIT.  So with such a good precentage, there are very high chances that you might get a course of your own choice in any one of these institutes.

But my recommendation to you would be that you should appear for JEE MAINS also. Although you are already eligible for admission but sometimes the merit goes very high as the competition is high.