UPC should work just like the GS1.
 
You can find out more about specifications on Google Manufacturer Center’s support page.

Watch our Google Manufacturer Center Webinar with Google.

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Brian Roizen is the co-founder and chief architect of Feedonomics, a full-service feed optimization platform that optimizes product data for hundreds of channels. He has been featured on numerous podcasts and eCommerce webinars, and regularly contributes to Search Engine Land and other industry-leading blogs. Brian graduated summa cum laude from UCLA with both a Bachelor’s and Master’s degree in Mechanical Engineering.