GTA RP rose to become one of Twitch's most viewed game categories in recent years. It's natural to expect GTA RP to continue onto GTA 6, but people have the timeframe wrong.
The rest of our RP map coverage is in the RP server map hub.
RP requires several things to exist
A multiplayer framework that allows servers to have their own rules. Support for custom interiors and locations (MLOs). Some sort of scripting environment for jobs, economy, and progression. Players who are willing to stick around and be a part of it. There's currently none of this for GTA 6.
The first three follow the PC release schedule. The fourth is partially in place - the current GTA RP crowd will migrate if a viable platform emerges. For rpservers.net and similar discovery sites, the early-GTA-6 era will be a busy one.
When meaningful RP servers will exist
Not at launch. That comes later. The PC version launches, then the framework comes out. The first serious RP servers will likely appear within a year or so of the PC release - sooner if Rockstar manages to ship their Cfx.re-built framework quickly, later if not.
Making something NoPixel-tier takes years. Don't expect launch-tier RP at GTA 6 launch on PC.
What might be different from GTA 5 RP
The map. Vice City and Leonida give RP servers a different geographic vocabulary - beach culture, tropical climate, Keys content, wetland content. The standard NoPixel-style police station and mechanic shop core will work in any setting; it'll just be Florida-coded flavour-wise.
The framework. If Rockstar releases official RP support through Cfx.re, the bar for new servers might be lower than it was for GTA 5 - meaning more servers, quicker, and with greater diversity. Anyone wanting to run a server rather than just play on one will come up against the pragmatic question of where to host said server; commercial GTA 6 server hosting options will surface well before GTA 6's PC release does.