Hi Khusboo,

Both are decent choices to pursue CSE. I would say that GTBIT is a slightly better choice to go for, since it is one of the traditionally reputed colleges of IPU. The study environment is serious here with good faculty. Placements are quite good for CSE and the package would depend on your abilities. 

JIIT also has good placements, but studies are not up to the mark. However, at the end self study is the most important. 

You can choose based on your priorities like location, studies fees etc. 

All the best!