- Games & Hobbies, Fort Atkinson
- Garage Doors & Door Operating Devices, Fort Atkinson
- Garage Doors & Gates, Fort Atkinson - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Fort Atkinson
- Garbage & Rubbish Removal, Fort Atkinson
- Garment & Linen Services, Fort Atkinson
- Gas Companies, Fort Atkinson
- Gas Station, Fort Atkinson - Service & Filling Station
- General Business Consulting, Fort Atkinson
- General Business Services, Fort Atkinson
- General Consultants, Fort Atkinson
- General Freight Trucking, Fort Atkinson - Motor Freight
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- General Hardware Stores, Fort Atkinson
- General Merchandise Stores, Fort Atkinson
- Gift Shops, Fort Atkinson - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Fort Atkinson
- Glass & Glass Products, Fort Atkinson
- Glass - Auto, Float, Plate, Window & Doors, Fort Atkinson
- Gourmet Restaurants, Fort Atkinson
- Government, Fort Atkinson
- Grocery Stores & Supermarkets, Fort Atkinson
- Ground Transportation, Except Passenger, Fort Atkinson
- Group Homes, Fort Atkinson
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