Hey Rohit!

AU and JNTU are so reputed universities and most of the seats in these universities are filled by GATE students . So there is more competition between PGCET students ,which means that the students applying through PGCET  must have a very good rank i.e. rank within 100 to get admission there. But your rank is much more than that , so you do not have any chances of admission by AP PGCET exam in these universities. 

I advise you to go for private counselling.