I am curious about this as well, so would appreciate feedback from anyone who has tried mounting Piezography gloss prints. I am unsure how the GO coating will respond, but believe it will act the same as Piezography inks.
While the inks are very stable, papers are sensitive to outgasing from such a wide source of materials that we do not advise mounting with glues or dry-mount, etc. We try to practice archival mounting as would museums do with works of art on paper. These are not traditional photographs, but rather pigment ink on paper. The one caveat is that the paper has a proprietary coating that the manufacturer guards - so it's not readily know what all the chemical ingredients are. We just know that they can discolor when exposed to certain materials such as plastic, steel, rubber, and to fumes from a variety of glues and adhesives.
Happy printing~ Dana