How do i transfer items from gta story mode to gta online?

Grand Theft Auto Online is a standalone multiplayer component of Grand Theft Auto V that operates independently from story mode. Once you start GTA Online, your progress exists in a separate database from the single-player campaign. The game does not provide any feature, setting, or option to transfer vehicles, weapons, money, or other items from story mode to online. Any purchases made in story mode, including cars from the dealership or properties, do not carry over to online play. This separation is by design, as online mode requires its own economy and progression system to function as a persistent multiplayer world.