Contact Us
Customer Service:
Phone: 800-322-5555 Option 1
Fax: 916-636-5101
Email: customerservice@gls-us.com
Sales:
Phone: 800-322-5555 Option 4
Email: sales@gls-us.com
Billing:
Phone: 800-322-5555 Option 6
Fax: 408-543-8301
Email: billing@gls-us.com
Corporate Address:
GLS US
4000 Executive Parkway
Suite 295
San Ramon, CA 94583