- Games & Hobbies, Wellsville
- Garbage & Rubbish Removal, Wellsville
- Gas & Air Compressors, Wellsville
- Gas Station, Wellsville - Service & Filling Station
- General Business Consulting, Wellsville
- General Business Services, Wellsville
- General Consultants, Wellsville
- General Hardware Stores, Wellsville
- General Merchandise Stores, Wellsville
- General Surgeons, Wellsville - General Surgery Doctors, Physicians & Surgeons
- Generators, Compressors, Pumps, Motors & Fans, Wellsville
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- Gift Shops, Wellsville - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Wellsville
- Glass & Glass Products, Wellsville
- Glass - Auto, Float, Plate, Window & Doors, Wellsville
- Golf Clubs Private, Wellsville
- Golf Courses, Wellsville
- Gospel Church, Wellsville
- Government, Wellsville
- Grocery Stores & Supermarkets, Wellsville
- Ground Transportation, Except Passenger, Wellsville
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