Goo Gone and Goof Off are definitely not interchangeable. Goo Gone is a citrus based cleaner, and Goof Off contains ethanol and Xylene (it smells like lighter fluid), so it *can* damage some finishes, although it takes off adhesives extremely well.
If your faceplate has a coating of some sort to protect the metal, Goof Off might harm it.
Raquel has a good suggestion to contact the manufacturer.