- Games & Hobbies, Tuscola
- Garage, Door & Window Products, Tuscola
- Garment & Linen Services, Tuscola
- Gas Companies, Tuscola
- Gas Station, Tuscola - Service & Filling Station
- General Business Consulting, Tuscola
- General Business Services, Tuscola
- General Consultants, Tuscola
- General Freight Trucking, Tuscola - Motor Freight
- General Hardware Stores, Tuscola
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- General Merchandise Stores, Tuscola
- General Surgeons, Tuscola - General Surgery Doctors, Physicians & Surgeons
- Gifts, Cards & Stationery Stores, Tuscola
- Golf Clubs Private, Tuscola
- Golf Courses, Tuscola
- Government, Tuscola
- Grain Bins, Tuscola
- Grain Handling Equipment, Tuscola
- Grocery Stores & Supermarkets, Tuscola
- Ground Transportation, Except Passenger, Tuscola
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