- Gambling & Lottery Services, Columbus
- Games & Hobbies, Columbus
- Garage Door Repair, Columbus
- Garage Doors & Door Operating Devices, Columbus
- Garage Doors & Gates, Columbus - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Columbus
- Garbage & Rubbish Removal, Columbus
- Garment & Linen Services, Columbus
- Gas Companies, Columbus
- Gas Equipment Industrial, Columbus
- Gas Station, Columbus - Service & Filling Station
- Gasoline, Columbus
- General Business Consulting, Columbus
- General Business Services, Columbus
- General Consultants, Columbus
- General Freight Trucking, Columbus - Motor Freight
- General Hardware Stores, Columbus
- General Management Consulting Services, Columbus - Management Consultants
- General Merchandise Stores, Columbus
- General Surgeons, Columbus - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Columbus
- Generator Sales & Rental, Columbus - Contractors Supplies & Equipment
- Generators, Compressors, Pumps, Motors & Fans, Columbus
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- Geotechnical Soils Engineer, Columbus
- Gift Shops, Columbus - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Columbus
- Glass & Glass Products, Columbus
- Glass & Glazing Contractors, Columbus
- Glass - Auto, Float, Plate, Window & Doors, Columbus
- Glass Tinting & Coating, Columbus - Home - Car Window Tinting
- Golf Courses, Columbus
- Golf Driving Ranges, Columbus
- Golf Lessons & Instruction, Columbus
- Gourmet Restaurants, Columbus
- Government, Columbus
- Grain Brokers, Columbus
- Grain Dryers & Drying Equipment Service & Repair, Columbus
- Graphic Design Services, Columbus - Graphic Designer
- Graphic Designer & Artist Services, Columbus
- Greeting Card Stores, Columbus
- Grocery Stores & Supermarkets, Columbus
- Ground Transportation, Except Passenger, Columbus
- Guide & Directory Advertising Services, Columbus
- Gun Repair & Services, Columbus
- Guns & Gunsmith Services, Columbus
- Gymnastics Schools, Columbus
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