How do i unlock items in gta online?

The Wikipedia entry for Grand Theft Auto Online describes the game as an online multiplayer action‑adventure set in the fictional state of San Andreas, noting its release dates and basic gameplay structure. It does not mention specific mechanics, such as how to unlock items, weapons, vehicles, or other in‑game content. Therefore, based on the available evidence, we cannot provide instructions or details on unlocking items within GTA Online.