Both men and woman are equal, so let's not judge based on that and just forget about the gender of the creator, since it doesn't matter at all.
Has to agree it doesn't matter at all.
But equality has nothing to do with the question, only underlining probability does.
1) Firstly, since, most of milestone IT achievements made by men. Satoshi most likely to be a man.
2) Secondly, Satoshi is the pseudonym and "generally a masculine Japanese given name" (wiki). And I think most likely person who choose male pseudonym would be male (Samuel-Mark as example).
Of course, there are probably some exceptions. But, in my opinion he is a man with 99.999% probability.