Hello,

As per your requirement, i would say that as you have passed your bcs in ggnou in 2019, you are definitely eligible for iit mca through giving iit jam for admission into different iits.

Those Candidates have obtained 50% marks in Graduation degree are applicable for MCA Entrance exam. (45% in case of candidates belonging to reserved category)You must have mathematics subject in 12th or Graduation standard.

The Eligible department for IIT JAM Exam for MCA course are BCA , B.Sc (IT,CS) , B.Sc in Mathematics.

Getting a seat in college is depending on many factors like studenrs to seat ratio, cut off, reservation, ranking of college, etc

Cut off varies evert year as per your reservation category and no. Of students applying for the same.

For more various exam for mca, chevk-

https://it.careers360.com/articles/5355-7-MCA-entrance-exams

Good luck