- Gambling & Lottery Services, South Lyon
- Games & Hobbies, South Lyon
- Games Toys & Childrens Vehicles Manufacturers, South Lyon
- Garage Door Repair, South Lyon
- Garage Doors & Door Operating Devices, South Lyon
- Garage Doors & Gates, South Lyon - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, South Lyon
- Garbage & Rubbish Removal, South Lyon
- Garment & Linen Services, South Lyon
- Gas Appliance Repair, Maintenance & Service, South Lyon
- Gas Detection, Asbestos & Lead Contractors, South Lyon
- Gas Station, South Lyon - Service & Filling Station
- General Business Consulting, South Lyon
- General Business Services, South Lyon
- General Consultants, South Lyon
- General Hardware Stores, South Lyon
- General Management Consulting Services, South Lyon - Management Consultants
- General Merchandise Stores, South Lyon
- General Travel Agents & Agencies, South Lyon
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- Generators, Compressors, Pumps, Motors & Fans, South Lyon
- Gifts, Cards & Stationery Stores, South Lyon
- Glass & Glass Products, South Lyon
- Glass - Auto, Float, Plate, Window & Doors, South Lyon
- Golf Clubs Private, South Lyon
- Golf Courses, South Lyon
- Golf Driving Ranges, South Lyon
- Gourmet Restaurants, South Lyon
- Government, South Lyon
- Graphic Design Services, South Lyon - Graphic Designer
- Graphic Designer & Artist Services, South Lyon
- Greeting Card Stores, South Lyon
- Grocery Store Delivery Service, South Lyon
- Grocery Stores & Supermarkets, South Lyon
- Ground Transportation, Except Passenger, South Lyon
- Gun Repair & Services, South Lyon
- Guns & Gunsmith Services, South Lyon
- Gutter Covers, South Lyon
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