- Garage Doors & Door Operating Devices, Hempstead
- Garage Doors & Gates, Hempstead - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Hempstead
- Garbage & Rubbish Removal, Hempstead
- Garment & Linen Services, Hempstead
- Gas Station, Hempstead - Service & Filling Station
- General Business Consulting, Hempstead
- General Business Services, Hempstead
- General Consultants, Hempstead
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- General Hardware Stores, Hempstead
- General Management Consulting Services, Hempstead - Management Consultants
- General Merchandise Stores, Hempstead
- Gifts, Cards & Stationery Stores, Hempstead
- Golf Courses, Hempstead
- Government, Hempstead
- Grocery Stores & Supermarkets, Hempstead
- Ground Transportation, Except Passenger, Hempstead
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