- Garage, Door & Window Products, Gorham
- Garment & Linen Services, Gorham
- Gas Equipment Industrial, Gorham
- Gas Station, Gorham - Service & Filling Station
- General Business Consulting, Gorham
- General Business Services, Gorham
- General Consultants, Gorham
- General Freight Trucking, Gorham - Motor Freight
- General Merchandise Stores, Gorham
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- Gifts, Cards & Stationery Stores, Gorham
- Glass, Gorham
- Glass & Glass Products, Gorham
- Glass - Auto, Float, Plate, Window & Doors, Gorham
- Glass Beads, Gorham
- Golf Courses, Gorham
- Government, Gorham
- Grocery Stores & Supermarkets, Gorham
- Ground Transportation, Except Passenger, Gorham
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