Board Thread:News and Announcements/@comment-6697950-20140102180802/@comment-6697950-20140419104838

Of course both versions are speculation, but I chose the first version as it's a speculation made by Kirito, while the other is a speculation made by us.

Anyway, the system has only two choices: female or male. I doubt that it could choose a "gender neutral" variant, so it had to choose one of the two. Though the question is whether it eventually figured out that he was male or whether it just picked randomly. The only thing we can say for certain is that Kirito is still treated as a male, but, as he is given the appearance of a female, the system should have has some problem assigning a gender to him.