Hey!

You do not need to appear for PGCET exam . You will be given admission on the basis of your GATE scores..There are two rounds of counselling for PGCET  exam. First one is for GATE qualified stydents and second one is for AP PGCET qualified students. This means that the first preference is given to GATE qualified students and first 2000 seats are filled by GATE qualified students.

To know more , follow the given link:

https://engineering.careers360.com/articles/karnataka-pgcet-counselling

Hope it helps!