Through CG PET rank, you can only get admission in the State Engineering colleges.
But, NIT is a centrally funded National level institute which gives admission only through JoSSA counseling.
For admission in any NIT, you need to clear JEE Mains and your JEE Mains rank will decide whether you will be able to get admission or not.
You can check all the details regarding JoSSA 2019 from the given link-
Hope this helps you.
All the best!!!