- Games & Hobbies, Gilbertsville
- Garage, Door & Window Products, Gilbertsville
- Garbage & Rubbish Removal, Gilbertsville
- Garment & Linen Services, Gilbertsville
- Gas & Air Compressors, Gilbertsville
- Gas Companies, Gilbertsville
- Gas Station, Gilbertsville - Service & Filling Station
- General Business Consulting, Gilbertsville
- General Business Services, Gilbertsville
- General Consultants, Gilbertsville
- General Merchandise Stores, Gilbertsville
- General Travel Agents & Agencies, Gilbertsville
- Generator Sales & Rental, Gilbertsville - Contractors Supplies & Equipment
- Generators, Compressors, Pumps, Motors & Fans, Gilbertsville
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- Gifts, Cards & Stationery Stores, Gilbertsville
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Gilbertsville
- Golf Clubs Private, Gilbertsville
- Golf Courses, Gilbertsville
- Gospel Church, Gilbertsville
- Government, Gilbertsville
- Grace Gospel, Gilbertsville
- Greeting Card Stores, Gilbertsville
- Grocery Stores & Supermarkets, Gilbertsville
- Ground Transportation, Except Passenger, Gilbertsville
- Group Homes, Gilbertsville
- Gun Repair & Services, Gilbertsville
- Guns & Gunsmith Services, Gilbertsville
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