- Games & Hobbies, Southport
- Garage, Door & Window Products, Southport
- Garbage & Ash Containers, Southport
- Garment & Linen Services, Southport
- Gas Companies, Southport
- Gas Line Installation Contractors, Southport - Gas Pipe Installation - Repair Service
- Gas Station, Southport - Service & Filling Station
- General Business Consulting, Southport
- General Business Services, Southport
- General Consultants, Southport
- General Freight Trucking, Southport - Motor Freight
- General Management Consulting Services, Southport - Management Consultants
- General Merchandise Stores, Southport
- General Surgeons, Southport - General Surgery Doctors, Physicians & Surgeons
- Generators, Compressors, Pumps, Motors & Fans, Southport
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- Gift Shops, Southport - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Southport
- Glass & Glass Products, Southport
- Glass - Auto, Float, Plate, Window & Doors, Southport
- Golf Cars & Carts, Southport
- Golf Cars & Carts Manufacturers, Southport
- Golf Clubs Private, Southport
- Golf Courses, Southport
- Gourmet Restaurants, Southport
- Government, Southport
- Grading Contractors, Southport - Excavating - Excavation Companies
- Greeting Card Stores, Southport
- Grocery Stores & Supermarkets, Southport
- Ground Transportation, Except Passenger, Southport
- Gutters & Downspout Cleaning & Repairing, Southport
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