Multiplayer references found in files
Players examining the preload files have found references to "joinSession," "launchActivity," and "launchMultiplayerActivity." An account focused on reporting PlayStation game file sizes also noticed "intentType": "launchMultiplayerActivity." Rockstar has not officially announced any multiplayer component for GTA 6, despite the continued popularity of GTA Online.
The preload also suggests that the story and multiplayer elements of GTA 6 will be separated from each other, allowing players to download only the part of the game they want. That is based on the game's story being an individual download within the game's files. One Rockstar fan believes that because the files for story content are separated out from the main game files, the same will be true for the inevitable next version of GTA Online, suggesting that players will eventually be able to install single-player and Online separately.