Yes, there are students from West Bengal in IIITM, Gwalior. But, they are fewer in number.
In addition to this, you will also find a few non-residential Bengali from West Bengal studying in the college. You will find Bengalis from other parts of the country studying here. There are also few Bangali faculties at the campus.
Gwalior has its own Bengali community. Three to four Durga pujas are held around the city. Plus, you will have no problem finding non-vegetarian food in the city. My friend from the institute, who is a self-proclaimed foodie, also found few places in the city that sells fish.