- Games & Hobbies, Douglas
- Garbage Disposals, Douglas
- Garment & Linen Services, Douglas
- Gas Companies, Douglas
- Gas Station, Douglas - Service & Filling Station
- General Business Consulting, Douglas
- General Business Services, Douglas
- General Consultants, Douglas
- General Freight Trucking, Douglas - Motor Freight
- General Hardware Stores, Douglas
- General Merchandise Stores, Douglas
- General Surgeons, Douglas - General Surgery Doctors, Physicians & Surgeons
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- Gift Shops, Douglas - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Douglas
- Glass & Glass Products, Douglas
- Glass - Auto, Float, Plate, Window & Doors, Douglas
- Golf Courses, Douglas
- Government, Douglas
- Grocery Stores & Supermarkets, Douglas
- Ground Transportation, Except Passenger, Douglas
- Guest Houses & Ranches, Douglas
- Gun Repair & Services, Douglas
- Guns & Gunsmith Services, Douglas
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