Platforms and the PC question
The announced console versions and the limits of the current PC information.

The announced GTA VI launch platforms are PlayStation 5 and Xbox Series X|S. Rockstar's game page and platform FAQ are the references. A PC release date and PC system requirements are not established by those console listings.
A console family is not a performance result
Xbox Series S is included in the Series X|S announcement. That does not make its graphics settings, image resolution or performance identical to Series X. Sony labels the PS5 version PS5 Pro Enhanced, which identifies support for that system rather than publishing an independent frame-rate test. The names on a platform strip answer whether a console is supported; they do not answer how every scene runs.
PS4 and Xbox One are not among the announced launch platforms. Do not mistake an older-generation controller, backward-compatible store interface or GTA V listing for a GTA VI edition.
What a PC buyer can establish today
There is no supported basis here for a “minimum GPU,” a RAM requirement, an install size or a PC preorder promise. A retailer placeholder and a suggested PC build are different from a published specification. Even a later official PC announcement would still need its own release date and hardware requirements.
GTA V's history can explain why PC players watch Rockstar's schedule closely; it cannot supply GTA VI's timetable. If you are upgrading a PC for games generally, choose against measured performance in released software and your other workloads. Do not call a configuration GTA VI-ready on the strength of an unreleased PC benchmark.
Offline and online information
The PlayStation listing describes a one-player product with offline play enabled. That is useful scope for the listed game, not a full roadmap for any future online release. The established GTA Online associated with GTA V should not be presented as confirmed GTA VI multiplayer content. The archive's release page keeps the announced product separate from those open questions.