- Garage Doors & Door Operating Devices, Sauk City
- Garage Doors & Gates, Sauk City - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Sauk City
- Garbage & Rubbish Removal, Sauk City
- Garment & Linen Services, Sauk City
- Gas Equipment Industrial, Sauk City
- Gas Station, Sauk City - Service & Filling Station
- General Business Services, Sauk City
- General Freight Trucking, Sauk City - Motor Freight
- General Hardware Stores, Sauk City
- General Merchandise Stores, Sauk City
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- German Restaurants, Sauk City
- Gifts, Cards & Stationery Stores, Sauk City
- Government, Sauk City
- Grain Elevators, Sauk City
- Granite, Sauk City
- Grocery Stores & Supermarkets, Sauk City
- Ground Transportation, Except Passenger, Sauk City
- Gun & Hunting & Fishing Clubs, Sauk City
- Gun Repair & Services, Sauk City
- Guns & Gunsmith Services, Sauk City
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