Culture:
Apart from the major religious festivals of Diwali, Christmas, Dussera, Holi etc., the diverse ethnic populace of the town celebrates several local festivals. The Lepchas and Bhutias celebrate new year in January, while Tibetans celebrate the new year (Losar) with "Devil Dance" in January–February. The Maghe sankranti, Ram Navami, Chotrul Duchen, Buddha Jayanti, the birthday of the Dalai Lama, Loosong, Bhumchu, Saga Dawa, Lhabab Duechen and Drupka Teshi are some other festivals, some distinct to local culture and others shared with the rest of India, Nepal, Bhutan and Tibet.
A popular food in Gangtok is the momo, a steamed dumpling containing pork, beef and vegetables cooked in a doughy wrapping and served with watery soup. Wai-Wai is a packaged snack consisting of noodles which are eaten either dry or in soup form. A form of noodle called thukpa, served in soup form is also popular in Gangtok. Other noodle-based foods such as the chowmein, thanthuk, fakthu, gyathuk and wonton are available. Other traditional Sikkimese cuisine include shah-phaley (Sikkimese patties with spiced minced meat in a crisp samosa-like case) and Gack-ko soup. Restaurants offer a wide variety of traditional Indian, continental and Chinese cuisines to cater to the tourists. Churpee, a kind of hard cheese made from cow's or yak's milk is sometimes chewed. Chhang is a local frothy millet beer traditionally served in bamboo tankards and drunk through bamboo or cane straws. Alcohol is cheap due to low excise duty in Sikkim. Beer, whiskey, rum and brandy are frequently consumed by both locals and non-locals.

Language:
Nepali is the most widely spoken language in Gangtok. English and Hindi being the official language of  Gangtok. Other languages spoken in Gangtok include Bhutia (Sikkimese), Tibetan and Lepcha.