B.Tech Computer Science and Engineering

First, you will have to check whether the college offers admission through Management quota. You can do this by visiting the college official website (Website:- http://www.hindustanuniv.ac.in), or download the college brochure from the link provided below. Admission guidelines and eligibility for th

Yes, you can apply but you have to clear an entrance exam for engineering.
Many private colleges take direct admission so you can contact directly the college.
It is not a good choice to opt for engineering after B.Com. Go for MBA or law.

CGPA varies according to the company but most of the good company are asking for minimum 7.5 CGPA.

Hello Kisalay,
Obtaining engineering degree via distance learning mode is very hazardous. SC of India has banned it presently. However, some unscrupulous institutions are interpreting SC decision differently. But finally only you will be the looser. So my advice is avoid this altogether.

For writing the SET exam you should have a Master’s degree.

It is around 1 Lacs per semester (tuition. Fee only). Mainly it depend upon the college branch you will take. If you take the Noida branch then it's fee is more high than a Lucknow branch. http://www.amity.edu/course-list.aspx?fd=Engineering&Programs=Graduate
See here all about the college fee. Don't

I think there is a mistake in your question.
Because GATE is meant for Post-Graduation courses but it can't make you to get into B.Tech
First of all, you have to complete your B.Tech to be eligible for the GATE.
But, if you want to join in B.Tech CSE in GITAM, you have to appear for GAT entrance exam

Top Computer Science Engineering Colleges in India are mentioned at the link provided below. The ranking is based on engineering ranking published by The Week. Please note that the list contains both public and private colleges. Regards. https://www.shiksha.com/b-tech/ranking/top-computer-science-en