- Gambling Supplies & Equipment, Uncasville - Slot Machines, Roulette wheel, Poker Sets, Bingo Supplies, etc
- Games & Hobbies, Uncasville
- Garbage & Rubbish Removal, Uncasville
- Garment & Linen Services, Uncasville
- Gas Station, Uncasville - Service & Filling Station
- Gauges, Uncasville
- Gauges & Gages, Uncasville
- General Business Services, Uncasville
- General Merchandise Stores, Uncasville
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- Generators, Compressors, Pumps, Motors & Fans, Uncasville
- Gifts, Cards & Stationery Stores, Uncasville
- Golf Equipment & Supplies Stores, Uncasville - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Government, Uncasville
- Grading Contractors, Uncasville - Excavating - Excavation Companies
- Grocery Stores & Supermarkets, Uncasville
- Ground Transportation, Except Passenger, Uncasville
- Gun Repair & Services, Uncasville
- Guns & Gunsmith Services, Uncasville
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