- Games & Hobbies, South Houston
- Garage Door Repair, South Houston
- Garage Doors & Door Operating Devices, South Houston
- Garage Doors & Gates, South Houston - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, South Houston
- Garment & Linen Services, South Houston
- Gas Line Installation Contractors, South Houston - Gas Pipe Installation - Repair Service
- Gas Station, South Houston - Service & Filling Station
- General Business Services, South Houston
- General Freight Trucking, South Houston - Motor Freight
- General Hardware Stores, South Houston
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- General Merchandise Stores, South Houston
- General Travel Agents & Agencies, South Houston
- Gifts, Cards & Stationery Stores, South Houston
- Glass & Glass Products, South Houston
- Glass - Auto, Float, Plate, Window & Doors, South Houston
- Gold, Silver & Platinum Buyers, Sellers & Dealers, South Houston
- Government, South Houston
- Grocery Stores & Supermarkets, South Houston
- Ground Transportation, Except Passenger, South Houston
- Gun Repair & Services, South Houston
- Guns & Gunsmith Services, South Houston
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