- Garage, Door & Window Products, North Branford
- Garbage & Rubbish Removal, North Branford
- Garment & Linen Services, North Branford
- Gas Station, North Branford - Service & Filling Station
- General Business Services, North Branford
- General Merchandise Stores, North Branford
- General Travel Agents & Agencies, North Branford
- Generators, Compressors, Pumps, Motors & Fans, North Branford
- Glass & Glass Products, North Branford
- Glass - Auto, Float, Plate, Window & Doors, North Branford
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- Glass Plate Windows, North Branford
- Gold, Silver & Platinum Buyers, Sellers & Dealers, North Branford
- Golf Equipment & Supplies Stores, North Branford - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Government, North Branford
- Granite, North Branford
- Grease Traps, North Branford
- Grocery Stores & Supermarkets, North Branford
- Ground Transportation, Except Passenger, North Branford
- Gun Repair & Services, North Branford
- Guns & Gunsmith Services, North Branford
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