With a GATE score of 549 in Data Science, you've got a decent chance at some good colleges, especially the National Institutes of Technology (NITs). Keep in mind that cutoffs can change each year depending on how many people apply and how tough the exam was.

For NITs, you could look at places like NIT Warangal, NIT Trichy, and NIT Surathkal. They often have M.Tech programs in Data Science or related fields like AI that might be within your score range. Some of the newer IITs, like IIT Guwahati, IIT Jodhpur, and IIT Hyderabad, also offer M.Tech in Data Science or AI and could be possibilities.

Don't just focus on the top IITs though. Check out other well-regarded government and even some private colleges that accept GATE scores for their Data Science programs. Places like the University of Hyderabad or IIIT Bangalore (though their cutoffs might be a bit higher) are worth looking into.

Your best bet is to check the specific admission websites of these colleges. They'll have the most up-to-date information on their GATE score cutoffs for Data Science programs. Good luck with your applications!