- Games & Hobbies, Altamont
- Garage Doors & Gates, Altamont - Stores & Companies - Install & Repair Services
- Garbage & Rubbish Removal, Altamont
- Garment & Linen Services, Altamont
- Gas Companies, Altamont
- Gas Station, Altamont - Service & Filling Station
- General Business Services, Altamont
- General Freight Trucking, Altamont - Motor Freight
- General Merchandise Stores, Altamont
- Generators, Compressors, Pumps, Motors & Fans, Altamont
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- Glass & Glass Products, Altamont
- Glass - Auto, Float, Plate, Window & Doors, Altamont
- Glass Products Manufacturers, Altamont
- Golf Courses, Altamont
- Golf Lessons & Instruction, Altamont
- Government, Altamont
- Grocery Stores & Supermarkets, Altamont
- Ground Transportation, Except Passenger, Altamont
- Gun & Hunting & Fishing Clubs, Altamont
- Gutters & Downspout Cleaning & Repairing, Altamont
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