Can gta online rewards unlock story mode items?

The only information available from the provided source describes Grand Theft Auto Online as a separate online multiplayer component of Grand Theft Auto V. It details the game's release dates, platform availability, and the open‑world setting of San Andreas, but it does not mention any cross‑game interactions or the ability to unlock story mode items through online rewards. Because the source contains no mention of such a feature, we cannot confirm that online rewards unlock story mode items. Without additional evidence, the safest conclusion is that GTA Online and GTA V story mode remain distinct in terms of item availability.