- Garage Door Repair, Oakland
- Garage Doors & Door Operating Devices, Oakland
- Garage Doors & Gates, Oakland - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Oakland
- Garment & Linen Services, Oakland
- Gas Equipment Industrial, Oakland
- Gas Station, Oakland - Service & Filling Station
- Gasoline, Oakland
- General Business Consulting, Oakland
- General Business Services, Oakland
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- General Consultants, Oakland
- General Freight Trucking, Oakland - Motor Freight
- General Management Consulting Services, Oakland - Management Consultants
- General Merchandise Stores, Oakland
- Gifts, Cards & Stationery Stores, Oakland
- Government, Oakland
- Greeting Card Stores, Oakland
- Grinding Equipment & Supplies, Oakland
- Grocery Stores & Supermarkets, Oakland
- Ground Transportation, Except Passenger, Oakland
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