- Garment & Linen Services, Unionville
- Gas Station, Unionville - Service & Filling Station
- General Business Consulting, Unionville
- General Business Services, Unionville
- General Consultants, Unionville
- General Management Consultants & Services, Unionville
- General Management Consulting Services, Unionville - Management Consultants
- General Merchandise Stores, Unionville
- General Travel Agents & Agencies, Unionville
- Gift Baskets, Unionville
- Gift Shops, Unionville - Gift, Novelty & Souvenir Stores
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- Gifts By Type & Occasion, Unionville
- Gifts, Cards & Stationery Stores, Unionville
- Golf Courses, Unionville
- Golf Equipment & Supplies Stores, Unionville - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Gospel Church, Unionville
- Government, Unionville
- Greeting Card Stores, Unionville
- Grocery Stores & Supermarkets, Unionville
- Ground Transportation, Except Passenger, Unionville
- Guide & Directory Advertising Services, Unionville
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