Used the GVK Business Class lounge in Dec (prior to boarding UA to EWR). Not spectacular but pretty nice. Not huge -- wasn't terribly crowded when I got there but then UA leaves before the "peak hour" in Mumbai for Intl flights. So I suspect space will be a bit tight in the midnight to 2 am window. There is a dining area with a hot buffet and snacks. There is also a full bar with a decent selection.

Dining area



Sitting area