Hi,
The component GoogleBaseXML works fine but Google wants a gtid included in the upload file. For this I extended the database table vm_product with a field product_barcode for the EAN-number of my products. But how do I get this included in the XML file? Which file do I need to change and how? Help will be much appreciated.

I found the solution in the documentation page (which was pretty hard to find btw). So problem solved.