I had a left over Bumblebee from a BB/SW pack, and I decided to do a quick repaint, I know I have seen a more complex altered version, but this was mean to be a quick repaint.
Are you sure you're not getting him mixed up with G2 Bumblebee? It looks like a good G2 bumblebee, but i don't see any resemblence to Goldbug here.