- Games & Hobbies, Brookville
- Garage, Door & Window Products, Brookville
- Garment & Linen Services, Brookville
- Gas Companies, Brookville
- Gas Station, Brookville - Service & Filling Station
- General Business Consulting, Brookville
- General Business Services, Brookville
- General Consultants, Brookville
- General Freight Trucking, Brookville - Motor Freight
- General Hardware Stores, Brookville
- General Merchandise Stores, Brookville
- General Travel Agents & Agencies, Brookville
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- Gifts, Cards & Stationery Stores, Brookville
- Glass & Glass Products, Brookville
- Glass - Auto, Float, Plate, Window & Doors, Brookville
- Government, Brookville
- Graphic Design Services, Brookville - Graphic Designer
- Graphic Designer & Artist Services, Brookville
- Grills & Grilling Equipment & Supplies, Brookville
- Grocery Stores & Supermarkets, Brookville
- Ground Transportation, Except Passenger, Brookville
- Gun Repair & Services, Brookville
- Guns & Gunsmith Services, Brookville
- Gymnastics Schools, Brookville
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