GATE Scores

Colleges providing M.Tech in Environmental Science without GATE score:
1. Indian Institute of Technology, Delhi
2. Indira Gandhi Open University, Delhi
3. Rajiv Gandhi Proudyogiki Vishwavidyalaya
4. Indian Institute of Technology, Kharagpur
5. Thapar Institute of Engineering and Technology, Patiala.
6. Jamia Millia Islamia, New Delhi
7. Visveswariah Technological University, AIT, Chikmagalur
8. Indian Institute of Technology, Madras
9. Indian Institute of Technology, Delhi
10. Indian Institute of Technology, Kanpur
11. Indian Institute of Technology, Madras
12. Jamia Millia Islamia, New Delhi
13. Visveswariah Technological University, AIT, Chikmagalur
14. Amity University
15. Visveswariah Technological University
Regards.

Yes a person get admission only on the basis of GATE 2018 score :
A national level examination, GATE (Graduate Aptitude Test in Engineering) is a qualifying exam for admissions to post-graduate programs (e. g. , M.E. , M.Tech, direct Ph.D. in Indian institutes of higher education with financial assistance provided by MHRD and other Government agencies. GATE scores may also be used by Public and Private Sector. The exam tests the comprehensive understanding of candidate in various undergraduate subjects including Engineering/ Technology/Architecture and post-graduate level subjects in Science. The exam, which is conducted online, encompasses 23 papers. The exam papers will have questions for which numerical answers must be keyed in by the candidate using the virtual keypad. However, the rest of the questions are of Multiple Choice Question (MCQ) type. For details check link :
https://www.shiksha.com/engineering/exams/gate.