The last time I played any Grand Theft Auto Anything was GTA III, so I'm not sure if you can "win" GTA V. But I'm pretty sure this guy won GTA V.
This was posted on Reddit r/GrandTheftAutoV by Niller25 under the title "Escaping from the cops." Niller25 claims no cheats were on, which is believable since he's driving the game's version of the Bugatti Veyron Super Sport.
Here's the full video:
And here are some more interesting moments from Kotaku.
Pretty Sure This Guy Won Grand Theft Auto V