- Games & Hobbies, American Canyon
- Garage, Door & Window Products, American Canyon
- Garbage & Rubbish Removal, American Canyon
- Garden & Lawn Sprinkler Repair, Installation & Service, American Canyon
- Garden Ornaments, American Canyon
- Garment & Linen Services, American Canyon
- General Business Consulting, American Canyon
- General Business Services, American Canyon
- General Consultants, American Canyon
- General Freight Trucking, American Canyon - Motor Freight
- General Management Consulting Services, American Canyon - Management Consultants
- General Merchandise Stores, American Canyon
- Generators, Compressors, Pumps, Motors & Fans, American Canyon
- Gift Shops, American Canyon - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, American Canyon
- Gifts Corporate, American Canyon
- Gifts, Cards & Stationery Stores, American Canyon
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- Glass & Glass Products, American Canyon
- Glass & Glazing Contractors, American Canyon
- Glass Plate Windows, American Canyon
- Glazing Contractors, American Canyon - Glass - Window Glazing
- Golf Driving Ranges, American Canyon
- Government, American Canyon
- Grading Contractors, American Canyon - Excavating - Excavation Companies
- Grape Vineyards, American Canyon
- Graphic Design Services, American Canyon - Graphic Designer
- Graphic Designer & Artist Services, American Canyon
- Gray & Ductile Iron Foundries, American Canyon
- Grease Traps, American Canyon
- Grocery Stores & Supermarkets, American Canyon
- Ground Transportation, Except Passenger, American Canyon
- Gun Repair & Services, American Canyon
- Guns & Gunsmith Services, American Canyon
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