GEM, INC. Business Name: GEM, INC. Business Address: 6842 Commodore Drive Walbridge, OH 43465 Business Phone Number: 419-666-6554 Counties: Hillsdale, Lenawee, Monroe, Defiance, Fulton, Hancock, Henry, Lucas, Ottawa, Paulding, Putnam, Sandusky, Seneca, Williams, Wood Services: Alternative Energy, Commercial/Industrial, Voice/Data/Video