I think in large metropolitan areas it's possible you'll find small exclaves of drow, but I've never considered Baldur's Gate to be such a metropolis. I don't know how much it's grown since Baldur's Gate. From what I understand a number of calamites have actually reduced the size of a lot of cities in FR, so BG might be smaller than it was.
Also I don't think Dark Gnomes and Drow are a good equivalence, considering one's a good race and the other is a hobbled by a demon worshipping theocracy.
If people's reaction to a Drow Tav is anything to go by, we'll be out of place, but our associates will give us a pass.
