- Games & Hobbies, West Haven
- Garage Building & Repair, West Haven - Carports - Garage Builders
- Garage Doors & Door Operating Devices, West Haven
- Garage Doors & Gates, West Haven - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, West Haven
- Garbage & Rubbish Removal, West Haven
- Garment & Linen Services, West Haven
- Gas Station, West Haven - Service & Filling Station
- Gazebo Builders, West Haven - Installation, Repair & Maintenance Services
- General Business Consulting, West Haven
- General Business Services, West Haven
- General Consultants, West Haven
- General Hardware Stores, West Haven
- General Merchandise Stores, West Haven
- General Travel Agents & Agencies, West Haven
- Generators, Compressors, Pumps, Motors & Fans, West Haven
- Gift Baskets, West Haven
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- Gift Shops, West Haven - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, West Haven
- Gifts, Cards & Stationery Stores, West Haven
- Glass & Glass Products, West Haven
- Glass - Auto, Float, Plate, Window & Doors, West Haven
- Glass Giftware, West Haven
- Gourmet Food Stores, West Haven
- Government, West Haven
- Granite, West Haven
- Graphic Design Services, West Haven - Graphic Designer
- Graphic Designer & Artist Services, West Haven
- Grocery Stores & Supermarkets, West Haven
- Ground Transportation, Except Passenger, West Haven
- Gun Repair & Services, West Haven
- Guns & Gunsmith Services, West Haven
- Gutters & Downspout Cleaning & Repairing, West Haven
- Gymnastics Schools, West Haven
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