- Games & Hobbies, East Islip
- Garage Doors & Door Operating Devices, East Islip
- Garage Doors & Gates, East Islip - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, East Islip
- Garden & Lawn Sprinkler Repair, Installation & Service, East Islip
- Garment & Linen Services, East Islip
- Gas Station, East Islip - Service & Filling Station
- Gastroenterologists, East Islip - GI Doctors, Physicians & Surgeons (Gastroenterology)
- General Business Services, East Islip
- General Hardware Stores, East Islip
- General Merchandise Stores, East Islip
- General Travel Agents & Agencies, East Islip
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- Gift Certificates, East Islip
- Gift Shops, East Islip - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, East Islip
- Gifts, Cards & Stationery Stores, East Islip
- Glass & Glass Products, East Islip
- Glass - Auto, Float, Plate, Window & Doors, East Islip
- Gold, Silver & Platinum Buyers, Sellers & Dealers, East Islip
- Government, East Islip
- Greeting Card Stores, East Islip
- Grocery Stores & Supermarkets, East Islip
- Ground Transportation, Except Passenger, East Islip
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