- Games & Hobbies, Jamestown
- Garage, Door & Window Products, Jamestown
- Garbage & Rubbish Removal, Jamestown
- Garment & Linen Services, Jamestown
- General Business Consulting, Jamestown
- General Business Services, Jamestown
- General Consultants, Jamestown
- General Management Consulting Services, Jamestown - Management Consultants
- General Merchandise Stores, Jamestown
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- General Travel Agents & Agencies, Jamestown
- Geriatric Care Management, Jamestown
- Gifts, Cards & Stationery Stores, Jamestown
- Golf Courses, Jamestown
- Government, Jamestown
- Graphic Design Services, Jamestown - Graphic Designer
- Graphic Designer & Artist Services, Jamestown
- Grocery Stores & Supermarkets, Jamestown
- Ground Transportation, Except Passenger, Jamestown
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