Silly kids! Don't even know that a blacked out tailpanel is from the old SS396 cars!
And the factory did not use gloss black, more of a satin black on the tailpanel and rockers I believe. I would just call it a custom tailpanel, and leave Berger out of it. I actually like the CAMARO letters with the inserts myself. I actually have the black tailpanel on my SS396, the Z28 emblem on my 69 Z28 and the CAMARO letters on my 2000 so I've got them all covered.
Your custom tailpanel came out good.