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About Golden State Overnight
GSO was founded in 1995 with a simple notion: that California companies should not be required to pay high national delivery rates for in-state shipments. Today, GSO offers guaranteed ground and priority overnight delivery to every address in California, and select metropolitan areas of Nevada and Arizona. GSO customers enjoy a premium level standard of service, including later pickups, earlier deliveries and proactive package tracking, as well as unsurpassed customer service and a substantial continued cost savings over the national carriers.
GSO Tracking Help
- If you have problem with our express tracking system, please track your package directly on the GSO website.
- If you get no tracking information from GSO official website, you’d better contact them.
Help Center of GSO Tracking
If you have problem with our GSO Tracking system, submit your problem here, we will help you as soon as possible.
Declare: We can NOT contact carrier or others on your behalf, we can only help you track your package with your GSO tracking number on official tracking system.