What content requires story mode to unlock in gta v?

The verified evidence confirms that Grand Theft Auto V features a single-player story mode following three protagonists—Michael De Santa, Franklin Clinton, and Trevor Philips—as they attempt heists under pressure from criminal and governmental forces. However, the evidence does not detail any specific in-game content that is locked behind or requires completion of the story mode to unlock. Information about unlocks, such as heists, vehicles, or other features, is not included in the provided Wikipedia excerpt. For precise details about content tied to story mode progression, additional sources or the game's official documentation would be necessary.