I got my boyfriend an electric guitar as a graduation gift. Any creative ideas on how to really suprise him?

He’s been wanting one and talking about learning to play ever since we started dating two years ago. He knows I’ve gotten him something but doesn’t know what.
As an evil twist I gift wrapped it to make it all girly looking. Imagine pink giftwrap with cherries on it and pink bows glued everywhere.
I don’t want [...]