Ghaziabad

No. they only consider overall percentile.

GLIM PGPM is an intensive one year program. It offers good courses but time is the most important factor when it comes to learning. If you are an ardent learner the go ahead with GLIM. Placements are good.
However if you want to learn MBA covering all aspects of the course along with internship and the regularities of a B school then go for a 2 year program. It offers a better learning. Placements are good at IMT with huge alumni base.
Choice is yours.

Both colleges are at par with each other. If you want to pursue your career in Finance then opt for IMI.
If your choices are included towards marketing, then go for IMT as its their flagship program.
Rest parameters are more or less the same. Choice is yours.

IMT Ghaziabad is a good B-School with good track record of placements and academic excellence. BSchool ranked 7th in overall B-school ranking by Business World in 2014.

Yes, you can get admission in all private college through management quota. In IMT-G people who join through management quota are called “Paua's”. It is fairly easy to differentiate the Paua's from the 97 percentile above people. During placements some companies make you write down your CAT percentile on your CV.

In terms of placement and other infrastructural support the colleges can be ranked as KJ Somaiya, IMI Delhi, IMT Ghaziabad. NMIMS, Welingkar and SP Jain are also considerable.

Yes, it has good curriculum and offer good exposure to all management facets.
Below mentioned are some of the best options:
1. NMIMS.
2. Amity.
3. Symbiosis.
4. Welingkar.
5. IGNOU.

IMT Ghaziabad is the best and offers 100% placements. IT is amongst top 40 B-schools in India with good brand reputation and decent ROI.

The eligibility is class 12th or its equivalent with 45% marks. Physics, chemistry and biology as major subjects. You can fill the application for and you will be called for the interview.

You can visit the institute's website and check their faculty list and placement record.