An update to the Numinix version, now supporting Zen Carts 1.5.6b and above. Validated on PHP versions 7.0 through 8.3.
For additional questions and documentation, please see the GPSF Wiki.
Google API Documentation: https://support.google.com/merchants/answer/6324350?hl=en&ref_topic=6324338&sjid=18306132101193605684-NA
Zen Cart Support Thread: https://www.zen-cart.com/showthread.php?229785-Google-Product-Search-Feeder-II-Support-Thread
Zen Cart Plugin Download Link: https://www.zen-cart.com/downloads.php?do=file&id=2379