- Games & Hobbies, Altoona
- Garage, Door & Window Products, Altoona
- Garden & Lawn Sprinkler Repair, Installation & Service, Altoona
- Gas Station, Altoona - Service & Filling Station
- General Business Consulting, Altoona
- General Business Services, Altoona
- General Consultants, Altoona
- Generators, Compressors, Pumps, Motors & Fans, Altoona
- Glass & Glass Products, Altoona
- Glass & Glazing Contractors, Altoona
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- Glass - Auto, Float, Plate, Window & Doors, Altoona
- Glass Tinting & Coating, Altoona - Home - Car Window Tinting
- Golf Clubs Private, Altoona
- Golf Courses, Altoona
- Government, Altoona
- Graphic Design Services, Altoona - Graphic Designer
- Graphic Designer & Artist Services, Altoona
- Grocery Stores & Supermarkets, Altoona
- Ground Transportation, Except Passenger, Altoona
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