- Gambling & Lottery Services, Ambridge
- Garage, Door & Window Products, Ambridge
- Garbage & Rubbish Removal, Ambridge
- Garden & Lawn Sprinkler Repair, Installation & Service, Ambridge
- Garment & Linen Services, Ambridge
- Gas Station, Ambridge - Service & Filling Station
- Gastroenterologists, Ambridge - GI Doctors, Physicians & Surgeons (Gastroenterology)
- General Business Consulting, Ambridge
- General Business Services, Ambridge
- General Consultants, Ambridge
- General Freight Trucking, Ambridge - Motor Freight
- General Management Consulting Services, Ambridge - Management Consultants
- General Merchandise Stores, Ambridge
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- General Travel Agents & Agencies, Ambridge
- Gifts, Cards & Stationery Stores, Ambridge
- Glass & Glass Products, Ambridge
- Glass - Auto, Float, Plate, Window & Doors, Ambridge
- Golf Courses, Ambridge
- Golf Equipment & Supplies Stores, Ambridge - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Government, Ambridge
- Grocery Stores & Supermarkets, Ambridge
- Ground Transportation, Except Passenger, Ambridge
- Gummed Tape, Ambridge
- Gun Repair & Services, Ambridge
- Guns & Gunsmith Services, Ambridge
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