It probably woud have some use, if genders of Pokemon actually mattered. But GF made sure, right from the beginning, to show, that they don't matter at all. It might be true, that people, who care more about certain mechanics, like breeding and battling, care more about what gender a certain Pokemon has, but ingame, that mechanic doesn't have any relevance.
What would be funny, though, are Pokemon that could possibly change their gender under certain circumstances, much like some animals irl do. I mean there's Azurill, that has a different gender ration, than its evolution Marill has, which can result in the Pokemon switching genders upon evolution, but I'm not even sure if it was intended, or just an oversight.