- Garage Doors & Door Operating Devices, Winchester
- Garage Doors & Gates, Winchester - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Winchester
- Garment & Linen Services, Winchester
- Gas Companies, Winchester
- Gas Station, Winchester - Service & Filling Station
- General Business Consulting, Winchester
- General Business Services, Winchester
- General Consultants, Winchester
- General Freight Trucking, Winchester - Motor Freight
- General Merchandise Stores, Winchester
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- General Surgeons, Winchester - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Winchester
- Geriatric Care Management, Winchester
- Gifts, Cards & Stationery Stores, Winchester
- Golf Courses, Winchester
- Government, Winchester
- Grading Contractors, Winchester - Excavating - Excavation Companies
- Greeting Card Stores, Winchester
- Grocery Stores & Supermarkets, Winchester
- Ground Transportation, Except Passenger, Winchester
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