- Gambling & Lottery Services, Lockport
- Games & Hobbies, Lockport
- Garage Building & Repair, Lockport - Carports - Garage Builders
- Garage Door Repair, Lockport
- Garage Doors & Door Operating Devices, Lockport
- Garage Doors & Gates, Lockport - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Lockport
- Garbage & Rubbish Removal, Lockport
- Garment & Linen Services, Lockport
- Gas Equipment Industrial, Lockport
- Gas Station, Lockport - Service & Filling Station
- Gastroenterologists, Lockport - GI Doctors, Physicians & Surgeons (Gastroenterology)
- General Business Consulting, Lockport
- General Business Services, Lockport
- General Consultants, Lockport
- General Hardware Stores, Lockport
- General Management Consulting Services, Lockport - Management Consultants
- General Merchandise Stores, Lockport
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- General Travel Agents & Agencies, Lockport
- Gifts, Cards & Stationery Stores, Lockport
- Glass & Glass Products, Lockport
- Glass & Glazing Contractors, Lockport
- Glass - Auto, Float, Plate, Window & Doors, Lockport
- Glass Tinting & Coating, Lockport - Home - Car Window Tinting
- Golf Clubs Private, Lockport
- Golf Courses, Lockport
- Gourmet Food Stores, Lockport
- Government, Lockport
- Granite, Lockport
- Grape Vineyards, Lockport
- Greek Restaurants, Lockport
- Grocery Stores & Supermarkets, Lockport
- Ground Transportation, Except Passenger, Lockport
- Gun & Hunting & Fishing Clubs, Lockport
- Gun Repair & Services, Lockport
- Guns & Gunsmith Services, Lockport
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