How do I verify a Gibson pickup?

Look on the back of the guitar pickup for a metal stamp reading “Gibson USA”; the stamp will look like an engraving.

Are there fake Gibson Les Pauls?

Fake Gibsons may have fretboard binding, but it is almost unheard of for them to get it right. On a genuine Gibson Les Paul, the fretboard binding should actually cover the edges of the frets. If there is binding and it does not protrude over the frets, you are dealing with a counterfeit.