- Games & Hobbies, Louiseville
- Garment & Linen Services, Louiseville
- Gas Companies, Louiseville
- Gas Station, Louiseville - Service & Filling Station
- General Business Services, Louiseville
- General Hardware Stores, Louiseville
- General Merchandise Stores, Louiseville
- General Travel Agents & Agencies, Louiseville
- Gifts, Cards & Stationery Stores, Louiseville
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- Glass & Glazing Contractors, Louiseville
- Glazing Contractors, Louiseville - Glass - Window Glazing
- Golf Clubs Private, Louiseville
- Golf Courses, Louiseville
- Government, Louiseville
- Graphic Designer & Artist Services, Louiseville
- Greeting Card Stores, Louiseville
- Grocery Stores & Supermarkets, Louiseville
- Ground Transportation, Except Passenger, Louiseville
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