- Games & Hobbies, North Tonawanda
- Garage Door Repair, North Tonawanda
- Garage Doors & Door Operating Devices, North Tonawanda
- Garage Doors & Gates, North Tonawanda - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, North Tonawanda
- Garbage & Rubbish Removal, North Tonawanda
- Garden & Lawn Equipment & Supplies Rental & Leasing, North Tonawanda
- Garden & Lawn Sprinkler Repair, Installation & Service, North Tonawanda
- Garment & Linen Services, North Tonawanda
- Gas Station, North Tonawanda - Service & Filling Station
- Gears, North Tonawanda
- Gears & Gear Cutting, North Tonawanda
- Gemologists & Jewelers, North Tonawanda
- General Business Consulting, North Tonawanda
- General Business Services, North Tonawanda
- General Freight Trucking, North Tonawanda - Motor Freight
- General Hardware Stores, North Tonawanda
- General Management Consulting Services, North Tonawanda - Management Consultants
- General Merchandise Stores, North Tonawanda
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- General Travel Agents & Agencies, North Tonawanda
- Generators, Compressors, Pumps, Motors & Fans, North Tonawanda
- Gift Shops, North Tonawanda - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, North Tonawanda
- Glass & Glass Products, North Tonawanda
- Glass - Auto, Float, Plate, Window & Doors, North Tonawanda
- Glass Block & Architectural, North Tonawanda
- Glass Stained & Leaded, North Tonawanda
- Golf Lessons & Instruction, North Tonawanda
- Government, North Tonawanda
- Grading Contractors, North Tonawanda - Excavating - Excavation Companies
- Graphic Design Services, North Tonawanda - Graphic Designer
- Graphic Designer & Artist Services, North Tonawanda
- Green - Landscape Contractors, North Tonawanda
- Greeting Card Stores, North Tonawanda
- Grocery Stores & Supermarkets, North Tonawanda
- Ground Transportation, Except Passenger, North Tonawanda
- Gummed Tape, North Tonawanda
- Gymnastics Schools, North Tonawanda
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