How do you unlock story mode missions in gta v?

The verified evidence from Wikipedia describes Grand Theft Auto V as a 2013 action-adventure game with three protagonists and its open-world setting, but it does not include details about game mechanics such as unlocking story mode missions. Story mode missions in GTA V typically progress automatically as players advance through the single-player campaign, following the narrative of Michael De Santa, Franklin Clinton, and Trevor Philips. Since the provided sources lack specific information about mission unlock conditions, no definitive answer can be derived from the evidence available.