- Games & Hobbies, Milton
- Garage, Door & Window Products, Milton
- Garment & Linen Services, Milton
- Gas Companies, Milton
- Gas Station, Milton - Service & Filling Station
- General Business Services, Milton
- General Freight Trucking, Milton - Motor Freight
- General Merchandise Stores, Milton
- General Travel Agents & Agencies, Milton
- Generators, Compressors, Pumps, Motors & Fans, Milton
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- Gift Shops, Milton - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Milton
- Glass Products Manufacturers, Milton
- Glass, Plastic & Rubber Working Machinery, Milton
- Government, Milton
- Grinding Services, Milton
- Grocery Stores & Supermarkets, Milton
- Ground Transportation, Except Passenger, Milton
- Gun Repair & Services, Milton
- Guns & Gunsmith Services, Milton
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