How does gta v handle character progression across modes?

The Wikipedia summary for Grand Theft Auto V describes the game as a 2013 action‑adventure title featuring three protagonists—Michael De Santa, Franklin Clinton, and Trevor Philips—who undertake heists in an open world based on Southern California. It mentions the ability to freely roam the world on foot or in vehicles and the presence of a single‑player story, but it does not detail how character progression works or how progression is managed when switching between the three characters. Therefore, based solely on the evidence given, no specific information about character progression across modes can be confirmed.