How do i join gta online on pc from an xbox account?

The only source provided discusses Grand Theft Auto: San Andreas, a 2004 action-adventure title released on consoles and PC, and it contains no information about GTA Online, cross‑platform play, or account linking between Xbox and the PC version of the game. Because the evidence does not cover the question, I cannot provide any steps or instructions on how to join GTA Online on PC using an Xbox account. If you need that information, you might look for official Rockstar or Microsoft documentation or support forums that address cross‑play and account linking. Until such evidence is available, I cannot answer the question definitively.