The original Baldur's Gate games are classics and very much worth playing. And there are no gay romances in them period.
However, if any game can be blamed for introducing the idea of romances in RPGs, everything annoying about them, and players' unhealthy obsession over them, it's definitely Baldur's Gate 2.
EDIT: I just remembered this isn't entirely true. While the original version of Baldur's Gate 2 had no gay romances, the Enhanced Edition that you're more likely to find now brought in some new companions, two of which can be romanced by a same-sex protagonist: Hexxat and Dorn. Don't know how they work or how they're written, but all the new characters in general are pretty divisive among fans, and Hexxat in particular is widely disliked, so it's probably best to ignore them.
Hilariously though, Hexxat is also a complete self-own. She's a lesbian, yes, and a BLACK one at that for double the points, but she's also an EVIL vampire who specifically PREYS on young women to sate her thirst for blood. The mission to recruit even involves letting her drain and kill a victim she has mind-controlled.
The original Baldur's Gate games are classics and very much worth playing. And there are no gay romances in them period.
However, if any game can be blamed for introducing the idea of romances in RPGs, everything annoying about them, and players' unhealthy obsession over them, it's definitely Baldur's Gate 2.