I can't believe how much discussion there still is over whether "squirting," "gushing," "female ejacualate," etc., is real. I can personally say yes, it's real, and not urine, because I have done it.
I remember just a few years ago leading sex educators were saying that they weren't convinced the g-spot existed at all. A few years after that, they were saying that the g-spot exists, but only some people have it. I think the current theory is that all women (or most women) have one, but you won't find it unless she is aroused. Yeesh.
I believe not long ago there was a study that showed that ejaculate was a different composition than urine.