hey there aspirant!
Hope you are doing well!

To answer your question, YES it is possible for branch upgradation in DTU. The upgradation is not done on the basis of your GPA rather your JEE rank. The possibility of internal upgradation of branches entirely depends upon the availability of seats in various branches of DTU only.
Here is the official notice link of DTU http://www.dtu.ac.in/Web/notice/2019/apr/file0412.pdf

Hope it helps!