- Garage Doors & Gates, Waterville - Stores & Companies - Install & Repair Services
- Garden & Lawn Sprinkler Repair, Installation & Service, Waterville
- Garment & Linen Services, Waterville
- Gas Companies, Waterville
- Gas Station, Waterville - Service & Filling Station
- General Business Consulting, Waterville
- General Business Services, Waterville
- General Consultants, Waterville
- General Freight Trucking, Waterville - Motor Freight
- General Merchandise Stores, Waterville
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- General Travel Agents & Agencies, Waterville
- Gifts, Cards & Stationery Stores, Waterville
- Golf Courses, Waterville
- Golf Driving Ranges, Waterville
- Government, Waterville
- Grocery Stores & Supermarkets, Waterville
- Ground Transportation, Except Passenger, Waterville
- Gun Repair & Services, Waterville
- Guns & Gunsmith Services, Waterville
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