Although the technical details are shady at this stage, it seems that Samsung is working on an in-house GPU for its upcoming gaming handset. Sadly, there is no release date to talk about yet, but given the increasing popularity of this segment of the market, there is no doubt that Samsung will join the gaming phone sector as soon as possible.
https://www.notebookcheck.net/Samsung-s-gaming-phone-with-in-house-GPU-allegedly-in-the-works.341401.0.html