- Games & Hobbies, Newton Center
- Garden & Lawn Sprinklers Systems – Equipment, Parts & Supplies, Newton Center
- Garment & Linen Services, Newton Center
- Gas Station, Newton Center - Service & Filling Station
- General Business Consulting, Newton Center
- General Business Services, Newton Center
- General Consultants, Newton Center
- General Freight Trucking, Newton Center - Motor Freight
- General Hardware Stores, Newton Center
- General Management Consulting Services, Newton Center - Management Consultants
- General Merchandise Stores, Newton Center
- General Surgeons, Newton Center - General Surgery Doctors, Physicians & Surgeons
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- General Travel Agents & Agencies, Newton Center
- Gifts, Cards & Stationery Stores, Newton Center
- Golf Clubs Private, Newton Center
- Golf Courses, Newton Center
- Gourmet Restaurants, Newton Center
- Government, Newton Center
- Graphic Design Services, Newton Center - Graphic Designer
- Graphic Designer & Artist Services, Newton Center
- Greeting Card Stores, Newton Center
- Grocery Stores & Supermarkets, Newton Center
- Ground Transportation, Except Passenger, Newton Center
- Gymnastics Schools, Newton Center
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