- Games & Hobbies, Fountain Valley
- Garage Door Repair, Fountain Valley
- Garage Doors & Door Operating Devices, Fountain Valley
- Garage Doors & Gates, Fountain Valley - Stores & Companies - Install & Repair Services
- Garage Doors & Openers Contractors, Fountain Valley
- Garage, Door & Window Products, Fountain Valley
- Garment & Linen Services, Fountain Valley
- Gas Station, Fountain Valley - Service & Filling Station
- Gemologists & Jewelers, Fountain Valley
- General Business Consulting, Fountain Valley
- General Business Services, Fountain Valley
- General Consultants, Fountain Valley
- General Freight Trucking, Fountain Valley - Motor Freight
- General Hardware Stores, Fountain Valley
- General Management Consultants & Services, Fountain Valley
- General Management Consulting Services, Fountain Valley - Management Consultants
- General Merchandise Stores, Fountain Valley
- General Surgeons, Fountain Valley - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Fountain Valley
- Geriatricians, Fountain Valley - Geriatric Specialists, Doctors, Physicians & Surgeons
- Gift Shops, Fountain Valley - Gift, Novelty & Souvenir Stores
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- Gifts, Cards & Stationery Stores, Fountain Valley
- Glass & Glass Products, Fountain Valley
- Glass - Auto, Float, Plate, Window & Doors, Fountain Valley
- Glass Plate Windows, Fountain Valley
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Fountain Valley
- Golf Courses, Fountain Valley
- Golf Equipment & Supplies Stores, Fountain Valley - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Gourmet Restaurants, Fountain Valley
- Government, Fountain Valley
- Graphic Design Services, Fountain Valley - Graphic Designer
- Graphic Designer & Artist Services, Fountain Valley
- Greek Churches, Fountain Valley
- Greeting Card Stores, Fountain Valley
- Grinding Services, Fountain Valley
- Grocery Store Delivery Service, Fountain Valley
- Grocery Stores & Supermarkets, Fountain Valley
- Ground Transportation, Except Passenger, Fountain Valley
- Gun Repair & Services, Fountain Valley
- Guns & Gunsmith Services, Fountain Valley
- Gymnastics Schools, Fountain Valley
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