The Google fields can be updated with Stock Sync by using the metafields.
| Google Fields | Metafield namespace and key |
| Google Product Category | mm-google-shopping.google_product_category |
| Gender | mm-google-shopping.gender |
| Brand | mm-google-shopping.brand |
| MPN | mm-google-shopping.mpn |
| Size | mm-google-shopping.size |
| Color | mm-google-shopping.color |
| Custom Product | mm-google-shopping.custom_product |
To know more about metafield click here.