- Games & Hobbies, Center Moriches
- Garage, Door & Window Products, Center Moriches
- Garden & Lawn Sprinkler Repair, Installation & Service, Center Moriches
- Garment & Linen Services, Center Moriches
- Gas Appliance Repair, Maintenance & Service, Center Moriches
- General Business Consulting, Center Moriches
- General Business Services, Center Moriches
- General Consultants, Center Moriches
- General Hardware Stores, Center Moriches
- General Management Consulting Services, Center Moriches - Management Consultants
- General Travel Agents & Agencies, Center Moriches
- Gift Baskets, Center Moriches
- Gift Shops, Center Moriches - Gift, Novelty & Souvenir Stores
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- Gifts By Type & Occasion, Center Moriches
- Gifts, Cards & Stationery Stores, Center Moriches
- Glass & Glass Products, Center Moriches
- Glass - Auto, Float, Plate, Window & Doors, Center Moriches
- Gourmet Restaurants, Center Moriches
- Government, Center Moriches
- Grading Contractors, Center Moriches - Excavating - Excavation Companies
- Grape Vineyards, Center Moriches
- Graphic Design Services, Center Moriches - Graphic Designer
- Graphic Designer & Artist Services, Center Moriches
- Grocery Stores & Supermarkets, Center Moriches
- Ground Transportation, Except Passenger, Center Moriches
- Gymnastics Schools, Center Moriches
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