- Games & Hobbies, South Portland
- Garage Doors & Door Operating Devices, South Portland
- Garage Doors & Gates, South Portland - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, South Portland
- Garbage & Rubbish Removal, South Portland
- Garment & Linen Services, South Portland
- Garment Pressing & Cleaners Agents, South Portland - Laundries & Dry Cleaners
- Gas Station, South Portland - Service & Filling Station
- General Business Consulting, South Portland
- General Business Services, South Portland
- General Consultants, South Portland
- General Freight Trucking, South Portland - Motor Freight
- General Management Consulting Services, South Portland - Management Consultants
- General Merchandise Stores, South Portland
- General Travel Agents & Agencies, South Portland
- Generators, Compressors, Pumps, Motors & Fans, South Portland
- Gift Baskets, South Portland
|
- Gift Shops, South Portland - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, South Portland
- Gifts, Cards & Stationery Stores, South Portland
- Glass & Glass Products, South Portland
- Glass & Glazing Contractors, South Portland
- Glass - Auto, Float, Plate, Window & Doors, South Portland
- Glass Repair, South Portland - Car, Window, Auto Glass Repair
- Glass Tinting & Coating, South Portland - Home - Car Window Tinting
- Gold, Silver & Platinum Buyers, Sellers & Dealers, South Portland
- Golf Courses, South Portland
- Golf Lessons & Instruction, South Portland
- Government, South Portland
- Graphic Design Services, South Portland - Graphic Designer
- Graphic Designer & Artist Services, South Portland
- Grocery Stores & Supermarkets, South Portland
- Ground Transportation, Except Passenger, South Portland
- Gymnastics Schools, South Portland
|
