Does completing gta v story mode unlock anything in online?

Grand Theft Auto V's single-player story mode and GTA Online are separate game modes with distinct progression systems. Completing the main story mode with its three protagonists—Michael De Santa, Franklin Clinton, and Trevor Philips—does not grant any unlockables, bonuses, currency, or content transfers to GTA Online. Players must start GTA Online as a fresh character with its own separate progression. The only connection between the two modes is that players can switch between them from the main menu, but achievements, story progress, and unlocks in one mode do not affect the other. Any bonuses or rewards for playing both modes are typically time-based or promotional, not tied to story completion.