- Games & Hobbies, Orangeville
- Garage Building & Repair, Orangeville - Carports - Garage Builders
- Garage Doors & Door Operating Devices, Orangeville
- Garage Doors & Gates, Orangeville - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Orangeville
- Garbage & Rubbish Removal, Orangeville
- Garment & Linen Services, Orangeville
- Gas Station, Orangeville - Service & Filling Station
- General Business Consulting, Orangeville
- General Business Services, Orangeville
- General Consultants, Orangeville
- General Freight Trucking, Orangeville - Motor Freight
- General Management Consulting Services, Orangeville - Management Consultants
- General Merchandise Stores, Orangeville
- General Travel Agents & Agencies, Orangeville
- Generators, Compressors, Pumps, Motors & Fans, Orangeville
- Geographic & Geomatic Products, Orangeville
- Geographic & Geomatic Services, Orangeville
- Geosynthetics, Orangeville
- Gift Shops, Orangeville - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Orangeville
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- Gifts, Cards & Stationery Stores, Orangeville
- Glass & Glass Products, Orangeville
- Glass & Glazing Contractors, Orangeville
- Glass - Auto, Float, Plate, Window & Doors, Orangeville
- Glass Stained & Leaded, Orangeville
- Glass Tinting & Coating, Orangeville - Home - Car Window Tinting
- Golf Clubs Private, Orangeville
- Golf Courses, Orangeville
- Golf Driving Ranges, Orangeville
- Gourmet Food Stores, Orangeville
- Government, Orangeville
- Granite, Orangeville
- Graphic Design Services, Orangeville - Graphic Designer
- Graphic Designer & Artist Services, Orangeville
- Greeting Card Stores, Orangeville
- Grocery Stores & Supermarkets, Orangeville
- Ground Transportation, Except Passenger, Orangeville
- Guide & Directory Advertising Services, Orangeville
- Gutter & Flashing Contractors, Orangeville - Metal - Copper Flashing - Gutter Cleaning & Repair Services
- Gymnastic Clubs, Orangeville
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