Hmm so when I was thinking there would be 'two different races' that are gender locked, it would be two different options to select from (Like Selecting Miqote or Hyur). However, it just dawned on me that what htey may end up doing is putting two races into one category and gender lock that way. So when you create/phantasia your character, its not Viera as one and Hrothgar as another, but both of them are part of some category (Lets call it Fuzzy People for clarity). So you select Fuzzy people and within that you have male Hrothgar, and Female Viera. Two races in one category.

If they did that, (and that might be something they would do) you can kiss any chance at Male Viera or Female Hrothgar good bye.