Dear Dedeepya, 

        Once you qualify in the PGCET, based on your rank, you will be called for counselling. For the counselling, you will have to register yourself which has to be done at the helpline centres which will be released by KEA (Karnataka Examinations Authority). Next, you will be called for document verification as per your rank. Thereafter, a verification slip and a secret key will be  provided to you. With the help of the secret key, you will be able to fill your choice of courses and colleges. Seats will be allotted to candidates based on their rank in Karnataka PGCET and preferences exercised by them during choice filling. 

Wishing you all the best !