As you may have recently heard, IBM have recently announced that GPFS has a new name. Its now Spectrum Storage.
Its been on the cards for a while that it was getting a new name - in fact it became Elastic Storage for a while, but I believe that was the code name for the rebranding project.
In any case, I'm sure most of us who've used it for a while will continue to call it GPFS!
It will be interesting to see if the Power ESS (Elastic Storage Server) will get renamed as well at some point!