I would think that gated options would be bi, to widen their net just a bit further. But that's just me and I'm not writing the characters. My hope is that his popularity makes him not-gated, but then that means someone else is gated, and...I can't think of anyone I wanted gated against anything.
Actually, I think we know that's not true at this point. David Gaider explicitly said that one of the race-gated characters has already been announced, Josephine and Iron Bull aren't gated, and the other four options are straight/gay/lesbian. So we know one of the characters is gated for both gender and race.
But yeah, race-gating is kind of odd to figure out, since I'm not sure anyone would want any specific character to be gated. I still think the most obvious gate choices at this point are Varric, Vivienne, and Cullen. If Varric and Vivienne are both in I could see Varric being free and clear, which would be awesome. On the other hand, I can't see Solas or Blackwall being gated, so if the last two romance options are both men, Varric's probably race-gated. (But also probably an LI, so, hey.) But that's all rampant speculation, so it's hard to say what will happen.