This LITE plugin outputs a valid Google Merchant XML feed from WooCommerce products and variations.

LITE includes
* Pretty URL: /3dl-gmc-feed.xml (and legacy ?zd_gmc=1)
* Correct base attributes (title, description, price, image, availability)
* Variant URLs built from selected attributes
* EU Unit Pricing tags (unit_pricing_measure/base_measure) when weight is present
* Coffee/Tea auto Google category helper
* GTIN/EAN detection from common meta keys (incl. Woodmart) + custom keys in settings
* Additional images from product gallery
* Capability-based admin (default manage_woocommerce)

PRO (optional) adds
* Multiple feed profiles (currency/UTM/conversion)
* Custom labels (custom_label_0–4), shipping, sale_price with effective_date
* Static feed builds via WP-Cron
* Diagnostics and export/import tools
* License screen and priority support

3DL Product Feed for Google Merchant Center