- Garage, Door & Window Products, Gridley
- Garbage & Rubbish Removal, Gridley
- Garment & Linen Services, Gridley
- Garment Pressing & Cleaners Agents, Gridley - Laundries & Dry Cleaners
- Gas Engine, Gridley
- Gas Station, Gridley - Service & Filling Station
- General Business Consulting, Gridley
- General Business Services, Gridley
- General Consultants, Gridley
- General Hardware Stores, Gridley
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- General Merchandise Stores, Gridley
- General Surgeons, Gridley - General Surgery Doctors, Physicians & Surgeons
- Gifts, Cards & Stationery Stores, Gridley
- Glass & Glass Products, Gridley
- Glass Plate Windows, Gridley
- Glass Stained & Leaded, Gridley
- Government, Gridley
- Grain Drying Equipment, Gridley
- Grocery Stores & Supermarkets, Gridley
- Ground Transportation, Except Passenger, Gridley
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