Hello Aspirant ,

As far as I know there is no branch of aerospace engineering in B.tech. There are only six branches of engineering in IIT gandhinagar namely computer science branch, mechanical engineering, metallurgical engineering, electronic and communication engineering ,chemical engineering.

For more information about the cut offs you can check out the link given below -

https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-gandhinagar