I read somewhere that yes - the screenwriters were purposefully paying homage to Rackam in POTC, just as they paid homage to the female pirates Bonny & Read by naming the angry boat owner Anamaria. It's at the very beginning of the first movie as Jack's boat is sinking while he glides into port. I recall he tips his hat to the Rackam figure.
And yes the real Rackam was definitely gibbeted!
Thanks, JS1990, for reminding me about this forum. I'd forgotten I was a member apparently!