GSO Tracking made simple. A quick & easy way to check the movement of your Golden State Overnight Package, Freight, Ground Shipping online as it travels to its final destination.

GSO Customer Help Desk:-

Helpline number: 800-322-5555
Email: customerservice@gls-us.com
FAX Number: 916-636-5101
Corporate Office Address: GLS USA (Golden State Overnight), 4000 Executive Parkway, Suite 295, San Ramon, CA 94583

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