- Games & Hobbies, Beamsville
- Garage, Door & Window Products, Beamsville
- Garment & Linen Services, Beamsville
- Gas Detection, Asbestos & Lead Contractors, Beamsville
- Gas Station, Beamsville - Service & Filling Station
- Gazebo Builders, Beamsville - Installation, Repair & Maintenance Services
- General Business Consulting, Beamsville
- General Business Services, Beamsville
- General Consultants, Beamsville
- General Merchandise Stores, Beamsville
- General Travel Agents & Agencies, Beamsville
- Generators, Compressors, Pumps, Motors & Fans, Beamsville
- Gift Baskets, Beamsville
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- Gift Shops, Beamsville - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Beamsville
- Gifts, Cards & Stationery Stores, Beamsville
- Glass & Glazing Contractors, Beamsville
- Glazing Contractors, Beamsville - Glass - Window Glazing
- Gospel Church, Beamsville
- Gourmet Food Stores, Beamsville
- Gourmet Restaurants, Beamsville
- Government, Beamsville
- Greenhouse Supplies, Kits & Equipment, Beamsville
- Grocery Stores & Supermarkets, Beamsville
- Ground Transportation, Except Passenger, Beamsville
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