Ehm, the short version is:
Time of Troubles - The Dark Three (Bane, Bhaal, Myrkul) become the Dead Three by dying
Baldurs Gate 1 and 2 happened. Jaheira and Minsc survive working with Gorions Ward.
Gorions Ward is (probably) a human male fighter named Abdel Adrian in Canon and decided to stay mortal.
[Other Stuff happens]
Minsc gets petrified and turned into a popular tourist spot in Baldurs Gate.
[Other Stuff happens]
Bane comes back to live.
[Other Stuff happens]
Mystra dies, Spellplague happened, AO is annoyed and the Second Sundering happens.
The Adventure "Murder in Baldurs Gate" happens - the seal on Bhaals esence is somehow gone (I blame AO), Viekang attacks Grand Duke Abdel Adrian
One of them dies, the other transformes into the Slayer and rampages. While the Slayer is stopped, Bhaal has returned
Myrkul is somehow also alive again.
The Dead Three forgoe true divinity to stay an active and direct power in the realm, now as Demi-Powers.
The Adventure "Baldur's Gate: Descent into Avernus" happens - Elturel goes on a vacation in the first layer of hell, thanks to its leader, adventurers manage to bring it back up, Zariel is still an Archdevil, Elturel kicks all Tieflings out
And.. thats it? A (very) quick overview of relevant events.