Gojushiho means "54 Steps"

There is a Sho and a Dai version of the Gojushiho Kata.   
They are much more closely related to each other than other Dai and Sho Kata  (Bassai and Kanku) being virtually identical to each other, with only a few different techniques within each to differentiate one from the other.
The shape of the Kata (Enbusen) is also the same, so it looks as if the two Gojushiho kata are actually two  interpretations of the same kata.

Funakoshi renamed the Kata to Hotaku, which is Japanese for a woodpecker bird.  This comes from the pecking motions performed using the hands through the Kata, and the forehead strike near the end, which are all reminiscent of the action of the woodpecker. 
Like many of Funakoshi's attempts to rename some Kata, this name didn't stick. 

The Gojushiho Kata are quite long and are usually only taught to more experienced Karateka as they are reasonably difficult.  They are however widely practiced and are regularly seen at tournaments, often receiving high level awards in competition.