- Games & Hobbies, Mechanicville
- Garment & Linen Services, Mechanicville
- Gas Station, Mechanicville - Service & Filling Station
- General Business Services, Mechanicville
- General Freight Trucking, Mechanicville - Motor Freight
- General Merchandise Stores, Mechanicville
- General Travel Agents & Agencies, Mechanicville
- Generators, Compressors, Pumps, Motors & Fans, Mechanicville
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- Glass & Glass Products, Mechanicville
- Glass - Auto, Float, Plate, Window & Doors, Mechanicville
- Golf Courses, Mechanicville
- Government, Mechanicville
- Grocery Stores & Supermarkets, Mechanicville
- Ground Transportation, Except Passenger, Mechanicville
- Gun Repair & Services, Mechanicville
- Guns & Gunsmith Services, Mechanicville
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