Post a clear side view of your critter with an unobstructed view of the tail base and we can tell you for sure. I think you've got a little girl there.
I have 1 male and 3 female rudis chams and 22 babies right now! Yours looks to be a female. Males usually have a blueish color to them. They are great chams, just remember that they like high humidity and cooler temps.