- Garage Building & Repair, Hortonville - Carports - Garage Builders
- Garage Doors & Door Operating Devices, Hortonville
- Garage Doors & Gates, Hortonville - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Hortonville
- Garbage & Rubbish Removal, Hortonville
- Garment & Linen Services, Hortonville
- Gas Piping Contractors, Hortonville - Gas Pipe Installation & Repair Service
- General Business Consulting, Hortonville
- General Business Services, Hortonville
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- General Consultants, Hortonville
- General Freight Trucking, Hortonville - Motor Freight
- General Management Consulting Services, Hortonville - Management Consultants
- General Merchandise Stores, Hortonville
- Golf Clubs Private, Hortonville
- Golf Courses, Hortonville
- Gourmet Food Stores, Hortonville
- Government, Hortonville
- Ground Transportation, Except Passenger, Hortonville
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