- Games & Hobbies, Stamford
- Garage Building & Repair, Stamford - Carports - Garage Builders
- Garage Door Repair, Stamford
- Garage Doors & Door Operating Devices, Stamford
- Garage Doors & Gates, Stamford - Stores & Companies - Install & Repair Services
- Garage Doors & Openers Contractors, Stamford
- Garage, Door & Window Products, Stamford
- Garbage & Rubbish Removal, Stamford
- Garden & Lawn Sprinkler Repair, Installation & Service, Stamford
- Garment & Linen Services, Stamford
- Garment Pressing & Cleaners Agents, Stamford - Laundries & Dry Cleaners
- Gas Companies, Stamford
- Gas Detection, Asbestos & Lead Contractors, Stamford
- Gas Equipment & Supplies, Stamford
- Gas Equipment Industrial, Stamford
- Gas Station, Stamford - Service & Filling Station
- Gasket, Stamford - Supply & Wholesale - Gaskets, Packing & Sealing Device
- Gastroenterologists, Stamford - GI Doctors, Physicians & Surgeons (Gastroenterology)
- Gears, Stamford
- Gears & Gear Cutting, Stamford
- Gemologists & Jewelers, Stamford
- General Business Consulting, Stamford
- General Business Services, Stamford
- General Consultants, Stamford
- General Freight Trucking, Stamford - Motor Freight
- General Hardware Stores, Stamford
- General Management Consultants & Services, Stamford
- General Management Consulting Services, Stamford - Management Consultants
- General Merchandise Stores, Stamford
- General Surgeons, Stamford - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Stamford
- Generator Sales & Rental, Stamford - Contractors Supplies & Equipment
- Generators, Compressors, Pumps, Motors & Fans, Stamford
- Geothermal Heating & Cooling Contractors, Stamford - Geothermal HVAC - Installation
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- Gift Baskets, Stamford
- Gift Shops, Stamford - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Stamford
- Gifts, Cards & Stationery Stores, Stamford
- Glass & Fiber Glass Materials, Stamford - Wholesale, Manufacturers & Suppliers
- Glass & Glass Products, Stamford
- Glass & Glazing Contractors, Stamford
- Glass - Auto, Float, Plate, Window & Doors, Stamford
- Glass - Beveled, Carved, Etched & Ornamental, Stamford
- Glass Plate Windows, Stamford
- Glass Repair, Stamford - Car, Window, Auto Glass Repair
- Glass Stained & Leaded, Stamford
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Stamford
- Golf Courses, Stamford
- Golf Equipment & Supplies Stores, Stamford - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Golf Lessons & Instruction, Stamford
- Gourmet Food Stores, Stamford
- Gourmet Restaurants, Stamford
- Government, Stamford
- Graffiti Removal & Protection Services, Stamford
- Granite, Stamford
- Graphic Design Services, Stamford - Graphic Designer
- Graphic Designer & Artist Services, Stamford
- Grease Traps, Stamford
- Greek Churches, Stamford
- Greeting Card Stores, Stamford
- Grills & Grilling Equipment & Supplies, Stamford
- Grocery Stores & Supermarkets, Stamford
- Ground Transportation, Except Passenger, Stamford
- Gutter Covers, Stamford
- Gutters & Downspout Cleaning & Repairing, Stamford
- Gymnasiums Equipment & Supplies Manufacturers, Stamford
- Gymnastics Schools, Stamford
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