- Games & Hobbies, Stonington
- Games Toys & Childrens Vehicles Manufacturers, Stonington
- Garage Building & Repair, Stonington - Carports - Garage Builders
- Garage Doors & Door Operating Devices, Stonington
- Garage Doors & Gates, Stonington - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Stonington
- Gas Station, Stonington - Service & Filling Station
- General Business Services, Stonington
- General Hardware Stores, Stonington
- General Management Consulting Services, Stonington - Management Consultants
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- General Merchandise Stores, Stonington
- General Travel Agents & Agencies, Stonington
- Gift Shops, Stonington - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Stonington
- Glass & Glass Products, Stonington
- Glass - Auto, Float, Plate, Window & Doors, Stonington
- Golf Courses, Stonington
- Government, Stonington
- Grape Vineyards, Stonington
- Gun & Hunting & Fishing Clubs, Stonington
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