- Games & Hobbies, Lambertville
- Games Toys & Childrens Vehicles Manufacturers, Lambertville
- Garage Doors & Door Operating Devices, Lambertville
- Garage Doors & Gates, Lambertville - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Lambertville
- Garment & Linen Services, Lambertville
- Gas Companies, Lambertville
- Gas Station, Lambertville - Service & Filling Station
- Gemologists & Jewelers, Lambertville
- General Business Consulting, Lambertville
- General Business Services, Lambertville
- General Consultants, Lambertville
- General Freight Trucking, Lambertville - Motor Freight
- General Management Consulting Services, Lambertville - Management Consultants
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- General Merchandise Stores, Lambertville
- General Travel Agents & Agencies, Lambertville
- Generators, Compressors, Pumps, Motors & Fans, Lambertville
- Gifts, Cards & Stationery Stores, Lambertville
- Glass & Glass Products, Lambertville
- Glass Circles & Specialty Shapes, Lambertville
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Lambertville
- Gourmet Food Stores, Lambertville
- Government, Lambertville
- Granite, Lambertville
- Graphic Design Services, Lambertville - Graphic Designer
- Graphic Designer & Artist Services, Lambertville
- Grocery Stores & Supermarkets, Lambertville
- Ground Transportation, Except Passenger, Lambertville
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