I don't think this is a good idea. For me girls or women can be at par with boys or men in term of chess abilities . Just look at the acheivement of Judith Polgar and recent prodigy - Hou Yifan . Playing among the same gender will not improve girls/women results .
Maybe girls and boys should continue compete in the same tourney and special prizes for girls/ women should be add in every tournaments !?
Look how Judith once beat the greatest chess player - Gary Kasparov ! The game was played in Russia vs Rest Of The World