- Games & Hobbies, Mountville
- Garment & Linen Services, Mountville
- General Business Consulting, Mountville
- General Business Services, Mountville
- General Consultants, Mountville
- General Management Consulting Services, Mountville - Management Consultants
- General Merchandise Stores, Mountville
- Generators, Compressors, Pumps, Motors & Fans, Mountville
- Gift Wrapping Materials, Mountville
- Gifts By Type & Occasion, Mountville
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- Gifts, Cards & Stationery Stores, Mountville
- Glass & Glass Products, Mountville
- Glass & Glazing Contractors, Mountville
- Glass - Auto, Float, Plate, Window & Doors, Mountville
- Glass Tinting & Coating, Mountville - Home - Car Window Tinting
- Gourmet Food Stores, Mountville
- Government, Mountville
- Grocery Stores & Supermarkets, Mountville
- Ground Transportation, Except Passenger, Mountville
- Gutters & Downspout Cleaning & Repairing, Mountville
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