No copper there, the gluconates used in a cleaning product would be there to chelate mineral deposits and not contain metals themselves.
Quote from Wikipedia article on
gluconates (Gluconic acid)
"Gluconic acid occurs naturally in fruit, honey, kombucha tea, and wine. As a food additive (E574[2]), it is an acidity regulator. It is also used in cleaning products where it dissolves mineral deposits especially in alkaline solution. The gluconate anion chelates Ca2+, Fe2+, Al3+, and other metals."