GoDaddy offers and sells a proprietary shopping cart that they market to merchants aside from being just a hosting platform. However, this shopping cart is not like a traditional eCommerce platform like Magento, Shopify, or WooCommerce so the plugins available for their system are limited.
The good news about the GoDaddy Shopping Cart is that it allows a number of plugins specifically to handle the checkout, including one built on the Ecwid platform. If a merchant uses the Ecwid checkout for the Wix Shopping Cart, they can leverage the Green Ecwid plugin to send that cart information to the Green System.
For more information on connecting Ecwid to GoDaddy Shopping Cart, you may need to contact either Ecwid or GoDaddy. Ecwid has some information about this on their website located at https://www.ecwid.com/godaddy
Information and installation instructions for the Green Ecwid plugin can be found at http://www.green.money/ecwid