- Gas Companies, Mapleton
- General Business Services, Mapleton
- General Merchandise Stores, Mapleton
- Generator Repair, Mapleton
- Generators, Mapleton - Solar, Steam, Wind Power, etc
- Gift Shops, Mapleton - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Mapleton
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- Glass & Glass Products, Mapleton
- Glass - Auto, Float, Plate, Window & Doors, Mapleton
- Government, Mapleton
- Grain Elevators, Mapleton
- Grease & Oil Disposal Sites, Mapleton
- Ground Transportation, Except Passenger, Mapleton
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