The actual historical gap between a Rockstar console launch and the PC version
Posting the pattern rather than a prediction, because the PC threads keep going in circles.
GTA V arrived on consoles in September 2013 and on PC in April 2015, which is about nineteen months, though that gap included a whole console generation transition in the middle.
Red Dead Redemption 2 was October 2018 on consoles and November 2019 on PC, which is thirteen months.
So the honest range from their own history is roughly twelve to twenty months, with nothing announced for this one. Anyone quoting a specific date is inventing it. Anyone saying never is ignoring two very clear precedents.