- Games & Hobbies, Wellesley
- Garage Doors & Door Operating Devices, Wellesley
- Garage Doors & Gates, Wellesley - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Wellesley
- Garbage & Rubbish Removal, Wellesley
- Garbage Disposal Equipment Repair & Service, Wellesley
- Garden & Lawn Sprinkler Repair, Installation & Service, Wellesley
- Garment & Linen Services, Wellesley
- Gas Station, Wellesley - Service & Filling Station
- Gasoline, Wellesley
- General Business Consulting, Wellesley
- General Business Services, Wellesley
- General Consultants, Wellesley
- General Hardware Stores, Wellesley
- General Management Consulting Services, Wellesley - Management Consultants
- General Merchandise Stores, Wellesley
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- General Surgeons, Wellesley - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Wellesley
- Gift Baskets, Wellesley
- Gifts By Type & Occasion, Wellesley
- Gifts, Cards & Stationery Stores, Wellesley
- Glass & Glass Products, Wellesley
- Glass - Auto, Float, Plate, Window & Doors, Wellesley
- Golf Courses, Wellesley
- Golf Equipment & Supplies Stores, Wellesley - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Gourmet Food Stores, Wellesley
- Government, Wellesley
- Graphic Design Services, Wellesley - Graphic Designer
- Graphic Designer & Artist Services, Wellesley
- Greeting Card Stores, Wellesley
- Grocery Stores & Supermarkets, Wellesley
- Ground Transportation, Except Passenger, Wellesley
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