Please anyone tell if my 12th percentage is less than 75 but I score good marks in jee mains exam then I get any good government college except NIT or IIIT?

You can apply for good private universities or institutes who are taking their own entrance exam and having their own admission criteria like:

SHIVNADAR UNIVERSITY

NORTHCAP UNIVERSITY

MANIPAL INSTITUTE OF TECHNOLOGY

BENNETT UNIVERSITY

IILM UNIVERSITY,GURUGRAM

LOVELY PROFESSIONAL UNIVERSITY

BML MUNJAL UNIVERSITY

AMITY UNIVERSITY

SRM UNIVERSITY etc

You can also try for state level counselling for engineering admission.

IILM UNIVERSITY,GURUGRAM is offering B.tech in computer Science and Information Technology with contemporary computing areas like:

Cloud Computing

Artificial Intelligence (AI)

Big data

Internet of Things (IoT)

Machine Learning

Deep Learning

Image processing

Block Chain

Hello Ayush

There are many private colleges as well who consider JEE Main marks to provide admission.

You can apply in DTU and NSIT they consider JEE Main marks to provide admission but counseling is held separately through JAC Delhi for eligibility you must have secured at least 60% aggregate marks or more in Physics, Chemistry and Mathematics there is relaxation for backward category as well.