- Garment & Linen Services, Madisonville
- Gas Companies, Madisonville
- Gas Liquefied Petroleum, Madisonville
- Gas Station, Madisonville - Service & Filling Station
- Gases, Madisonville
- Gasoline, Madisonville
- General Business Services, Madisonville
- General Merchandise Stores, Madisonville
- Generators, Compressors, Pumps, Motors & Fans, Madisonville
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- Gifts, Cards & Stationery Stores, Madisonville
- Glass & Glass Products, Madisonville
- Glass & Glazing Contractors, Madisonville
- Glass - Auto, Float, Plate, Window & Doors, Madisonville
- Glass Plate Windows, Madisonville
- Glass Tinting & Coating, Madisonville - Home - Car Window Tinting
- Government, Madisonville
- Grocery Stores & Supermarkets, Madisonville
- Ground Transportation, Except Passenger, Madisonville
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