- Galilean Church, Martinsville
- Garage Building & Repair, Martinsville - Carports - Garage Builders
- Garage Doors & Door Operating Devices, Martinsville
- Garage Doors & Gates, Martinsville - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Martinsville
- Garbage & Rubbish Removal, Martinsville
- Garment & Linen Services, Martinsville
- Garment Pressing & Cleaners Agents, Martinsville - Laundries & Dry Cleaners
- Gas Companies, Martinsville
- Gas Equipment Industrial, Martinsville
- Gas Station, Martinsville - Service & Filling Station
- Gastroenterologists, Martinsville - GI Doctors, Physicians & Surgeons (Gastroenterology)
- General Business Consulting, Martinsville
- General Business Services, Martinsville
- General Consultants, Martinsville
- General Freight Trucking, Martinsville - Motor Freight
- General Hardware Stores, Martinsville
- General Management Consulting Services, Martinsville - Management Consultants
- General Merchandise Stores, Martinsville
- General Travel Agents & Agencies, Martinsville
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- Generators, Compressors, Pumps, Motors & Fans, Martinsville
- Gift Shops, Martinsville - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Martinsville
- Glass & Glass Products, Martinsville
- Glass & Glazing Contractors, Martinsville
- Glass - Auto, Float, Plate, Window & Doors, Martinsville
- Glass Tinting & Coating, Martinsville - Home - Car Window Tinting
- Golf Cars & Carts, Martinsville
- Golf Courses, Martinsville
- Gospel Church, Martinsville
- Government, Martinsville
- Government And Administration Attorneys & Lawyers, Martinsville
- Government And Administration Attorneys & Lawyers, Martinsville
- Government And Administration Lawyers & Attorneys, Martinsville
- Graphic Design Services, Martinsville - Graphic Designer
- Graphic Designer & Artist Services, Martinsville
- Grocery Stores & Supermarkets, Martinsville
- Ground Transportation, Except Passenger, Martinsville
- Group Homes, Martinsville
- Gymnastics Schools, Martinsville
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