About GSO
Golden State Overnight (GSO) offers Priority Overnight Delivery to every address in California and select regions of Western Nevada and Arizona.
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Auto-Track GSO Shipments
Our Multi-Carrier Tracking API will auto-track your GSO shipments
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GSO Post-Shipping Automation
Fully integrate GSO tracking into your WooCommerce or Shopify store admin
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GSO Delivery Notifications
Send your customers automated GSO shipment status & delivery emails or SMS
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GSO Tracking on Your Store
Direct your customers to track GSO shipments on a tracking page on your store