GTA 6 is slated for early in the first quarter of 2027 on PC. While not officially confirmed, there are many rumors from sources with a proven track record regarding this company. We are truly getting very close to the next leap into GTA 6 RP; I estimate it will be playable by late 2027!
Source: Grand Theft Auto VI's PC release is slated for Q1 2027 - GamesBeat
(I assume they’re worried about emulation, unofficial ports, and how easy it is to reverse-engineer the PS5)