Adds GTIN field for WooCommerce Product.

This plugin will add a numeric GTIN field to Simple Products and Product Variation if they exist. This field can be used via shortcode [carmogtin] on product pages and for product feeds.

Finds products sharing an SKU, and products sharing or missing a GTIN. Read-only: it never writes to your catalogue.

MPN, ISBN, GTIN-8, UPC, EAN, GTIN-14, net dimensions, and fluid volume for better WooCommerce Schema markup.