- Games & Hobbies, Northwood
- Garage Doors & Gates, Northwood - Stores & Companies - Install & Repair Services
- Garment & Linen Services, Northwood
- Gas Companies, Northwood
- Gas Equipment Industrial, Northwood
- Gas Station, Northwood - Service & Filling Station
- General Business Consulting, Northwood
- General Business Services, Northwood
- General Consultants, Northwood
- General Freight Trucking, Northwood - Motor Freight
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- General Merchandise Stores, Northwood
- Gifts, Cards & Stationery Stores, Northwood
- Glass & Fiber Glass Materials, Northwood - Wholesale, Manufacturers & Suppliers
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Northwood
- Government, Northwood
- Grace Brethren, Northwood
- Grocery Stores & Supermarkets, Northwood
- Ground Transportation, Except Passenger, Northwood
- Gun Repair & Services, Northwood
- Guns & Gunsmith Services, Northwood
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