- Gambling & Lottery Services, Oakland
- Game & Wildlife Consultants, Oakland
- Games & Hobbies, Oakland
- Games Toys & Childrens Vehicles Manufacturers, Oakland
- Garage Door Repair, Oakland
- Garage Doors & Door Operating Devices, Oakland
- Garage Doors & Gates, Oakland - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Oakland
- Garbage & Rubbish Removal, Oakland
- Garden & Lawn Sprinkler Repair, Installation & Service, Oakland
- Garden Ornaments, Oakland
- Garment & Linen Services, Oakland
- Garment Pressing & Cleaners Agents, Oakland - Laundries & Dry Cleaners
- Gas Companies, Oakland
- Gas Detection, Asbestos & Lead Contractors, Oakland
- Gas Engine, Oakland
- Gas Equipment Industrial, Oakland
- Gas Station, Oakland - Service & Filling Station
- Gasket, Oakland - Supply & Wholesale - Gaskets, Packing & Sealing Device
- Gears, Oakland
- Gears & Gear Cutting, Oakland
- Gemologists & Jewelers, Oakland
- Genealogy, Oakland
- General Business Consulting, Oakland
- General Business Services, Oakland
- General Consultants, Oakland
- General Freight Trucking, Oakland - Motor Freight
- General Hardware Stores, Oakland
- General Management Consultants & Services, Oakland
- General Management Consulting Services, Oakland - Management Consultants
- General Merchandise Stores, Oakland
- General Surgeons, Oakland - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Oakland
- Generators, Compressors, Pumps, Motors & Fans, Oakland
- Geotechnical Engineer, Oakland
- Geotechnical Soils Engineer, Oakland
- Geriatricians, Oakland - Geriatric Specialists, Doctors, Physicians & Surgeons
- Gift Baskets, Oakland
- Gift Shops, Oakland - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Oakland
- Gifts Corporate, Oakland
- Gifts Wholesale & Retail, Oakland
- Gifts, Cards & Stationery Stores, Oakland
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- Glass, Oakland
- Glass & Glass Products, Oakland
- Glass & Glazing Contractors, Oakland
- Glass - Auto, Float, Plate, Window & Doors, Oakland
- Glass - Beveled, Carved, Etched & Ornamental, Oakland
- Glass Block & Architectural, Oakland
- Glass Bottles, Oakland
- Glass Broken, Oakland
- Glass Hand Blown Art, Oakland
- Glass Plate Windows, Oakland
- Glass Products Manufacturers, Oakland
- Glass Tinting & Coating, Oakland - Home - Car Window Tinting
- Glazing Contractors, Oakland - Glass - Window Glazing
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Oakland
- Golf Associations, Oakland
- Golf Clubs Private, Oakland
- Golf Courses, Oakland
- Gospel Church, Oakland
- Gourmet Food Stores, Oakland
- Gourmet Restaurants, Oakland
- Government, Oakland
- Government And Administration Attorneys & Lawyers, Oakland
- Government And Administration Attorneys & Lawyers, Oakland
- Government And Administration Lawyers & Attorneys, Oakland
- Government Contract & Relations Consultants, Oakland
- Government Information & Offices Miscellaneous, Oakland
- Grain Elevators, Oakland
- Granite, Oakland
- Graphic Design Services, Oakland - Graphic Designer
- Graphic Designer & Artist Services, Oakland
- Gray & Ductile Iron Foundries, Oakland
- Greek Churches, Oakland
- Greek Restaurants, Oakland
- Greeting Card Stores, Oakland
- Grills & Grilling Equipment & Supplies, Oakland
- Grinding Equipment & Supplies, Oakland
- Grinding Services, Oakland
- Grocery Store Delivery Service, Oakland
- Grocery Stores & Supermarkets, Oakland
- Ground Transportation, Except Passenger, Oakland
- Gutters & Downspout Cleaning & Repairing, Oakland
- Gymnastics Schools, Oakland
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