- Games & Hobbies, Wapakoneta
- Garage, Door & Window Products, Wapakoneta
- Garment & Linen Services, Wapakoneta
- Gas Companies, Wapakoneta
- Gas Station, Wapakoneta - Service & Filling Station
- Gastroenterologists, Wapakoneta - GI Doctors, Physicians & Surgeons (Gastroenterology)
- General Business Services, Wapakoneta
- General Freight Trucking, Wapakoneta - Motor Freight
- General Hardware Stores, Wapakoneta
- General Management Consulting Services, Wapakoneta - Management Consultants
- General Merchandise Stores, Wapakoneta
- Geotechnical Soils Engineer, Wapakoneta
- Geothermal Heating & Cooling Equipment, Systems & Supplies, Wapakoneta
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- Gift Shops, Wapakoneta - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Wapakoneta
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Wapakoneta
- Golf Courses, Wapakoneta
- Government, Wapakoneta
- Grain Elevators, Wapakoneta
- Greeting Card Stores, Wapakoneta
- Grocery Stores & Supermarkets, Wapakoneta
- Ground Transportation, Except Passenger, Wapakoneta
- Gun & Hunting & Fishing Clubs, Wapakoneta
- Gun Repair & Services, Wapakoneta
- Guns & Gunsmith Services, Wapakoneta
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