There are official D&D supplements for the heroes and villains of Baldur’s Gate 1 and 2

James Ohlen is the lead designer of BioWare’s two Baldur’s Gate games, and now he is the head of Archetype Entertainment, an in-house studio that develops story-driven video games for Wizards of the Coast. Obviously, with the help of some other former BioWare veterans (Drew Karpyshyn, Brent Knowles and Jesse Sky are all in the film), he also has time to make supplements for Dungeons and Dragons based on Baldur’s Gate.

Minsc & Boo’s Journal of Villainy contains the writing of characters in the original game based on D&D’s 5th edition statistics. Some are potential patrons of your character, and some are opponents. It also details the four cities in the game (Athkatla, Suldanessellar, Ust Natha, and of course Baldur’s Gate), as well as 12 monsters that have not entered 5E before (such as gibberish, sword spider, and phaerimm).