Max said:
What Max said.
The thing is... the logo, and name Gibson are intellectual property - trademark items - of Gibson. So whats the beef? They could say that you were trying to pass a cheap and inferior knockoff, not made or licensed by them, as the real McCoy.* Of course to anyone who knows his butt from an f-hole, they'd just say fugettabouddit, since they know the real thing from the fake. That clear and simple fact will not deter hungry lawyers.
What I like to do, to my amps, to my guitars, is logo them - but ALWAYS include someplace on the amp or in the f-hole label, or in the control cavity or someplace... that the guitar is my own creation, built as a form of homage to its inventor (which they are). That pretty much states your intent. It would be a good idea to make a written receipt stating exactly what the guitar is, who made it, and that its an artistic expression of homage to its inventor, upon the sale of the instrument to even your best friend. Save a copy of that paper, pretty much forever. Better yet, get buried with it.
Adding a logo.... like the Harley logo to bikes with absolutely no Harley parts - even the engine isn't Harley, but a 3rd party supplied unit. Like adding Ford to your 1938 Roadster kit that you assembled, that has no Ford parts in it. Its a form of artistic homage. That will fly in court, as long as you clearly state such.
And by the way, this is the REAL McCoy:
