- Games & Hobbies, Alpena
- Garage Building & Repair, Alpena - Carports - Garage Builders
- Garage Door Repair, Alpena
- Garage Doors & Door Operating Devices, Alpena
- Garage Doors & Gates, Alpena - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Alpena
- Garment & Linen Services, Alpena
- Gas & Air Compressors, Alpena
- Gas Companies, Alpena
- Gas Equipment Industrial, Alpena
- Gas Station, Alpena - Service & Filling Station
- General Business Consulting, Alpena
- General Business Services, Alpena
- General Consultants, Alpena
- General Freight Trucking, Alpena - Motor Freight
- General Merchandise Stores, Alpena
- General Surgeons, Alpena - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Alpena
- Generator Repair, Alpena
- Generator Sales & Rental, Alpena - Contractors Supplies & Equipment
- Generators, Alpena - Solar, Steam, Wind Power, etc
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- Generators, Compressors, Pumps, Motors & Fans, Alpena
- Gideon Church, Alpena
- Gift Shops, Alpena - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Alpena
- Glass & Glass Products, Alpena
- Glass - Auto, Float, Plate, Window & Doors, Alpena
- Glass Plate Windows, Alpena
- Glass Stained & Leaded, Alpena
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Alpena
- Golf Courses, Alpena
- Gospel Church, Alpena
- Gourmet Restaurants, Alpena
- Government, Alpena
- Graphic Design Services, Alpena - Graphic Designer
- Graphic Designer & Artist Services, Alpena
- Greeting Card Stores, Alpena
- Grocery Stores & Supermarkets, Alpena
- Ground Transportation, Except Passenger, Alpena
- Gun Repair & Services, Alpena
- Guns & Gunsmith Services, Alpena
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