For scheduling, account/billing questions and corporate inquiries, please call 312 560 2973.

Greg Gates
P.O. Box 804855
Chicago, IL 60680
E-mail: gates@gdminc.us

Warehouse
For technical questions, change orders or to report problems, please contact our warehouse during regular hours, 7 am – 3 pm, Monday – Friday and 7 am – 11 am on Saturday.

Warehouse Manager
9500 S. Dorchester Avenue
Chicago, IL 60628
Phone: 773.734.9500, 773.768.9500
E-mail: warehouse@gdminc.us