- Garbage & Rubbish Removal, Swanzey
- Garment & Linen Services, Swanzey
- Gas Equipment Industrial, Swanzey
- Gas Station, Swanzey - Service & Filling Station
- General Business Consulting, Swanzey
- General Business Services, Swanzey
- General Consultants, Swanzey
- General Merchandise Stores, Swanzey
- Gift Shops, Swanzey - Gift, Novelty & Souvenir Stores
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- Gifts, Cards & Stationery Stores, Swanzey
- Glass & Glass Products, Swanzey
- Glass - Auto, Float, Plate, Window & Doors, Swanzey
- Government, Swanzey
- Granite, Swanzey
- Graphic Design Services, Swanzey - Graphic Designer
- Graphic Designer & Artist Services, Swanzey
- Grocery Stores & Supermarkets, Swanzey
- Ground Transportation, Except Passenger, Swanzey
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