- Garage Doors & Door Operating Devices, Trenton
- Garage Doors & Gates, Trenton - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Trenton
- Garment & Linen Services, Trenton
- Gas Companies, Trenton
- General Business Services, Trenton
- General Freight Trucking, Trenton - Motor Freight
- General Hardware Stores, Trenton
- General Merchandise Stores, Trenton
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- Generators, Compressors, Pumps, Motors & Fans, Trenton
- Glass & Glazing Contractors, Trenton
- Glass Products Manufacturers, Trenton
- Glass Tinting & Coating, Trenton - Home - Car Window Tinting
- Government, Trenton
- Grease Traps, Trenton
- Grocery Stores & Supermarkets, Trenton
- Ground Transportation, Except Passenger, Trenton
- Gun & Hunting & Fishing Clubs, Trenton
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