I think most women can do it, but that isn't to say that most women do it on a regular basis, nor that they need to do it to enjoy themselves.
I squirt (gush, really, not like something shooting out) from time to time. Usually only with specific g-spots toys that give really good stimulation like the bent graduate
, or something similar. When I do squirt, my orgasm isn't any more intense than normal, nor do I notice any improvement to my sexual experience.
It's kind of fun for the novelty aspect, and my partner thinks it's sexy when it happens, but for us it just isn't a big deal. I'm sure others feel differently about it though.
Explore with g-spot toys if you want to, but don't pressure yourself to squirt, or get wrapped up in it - thinking it's the end-all and be-all of orgasmic bliss. But, enjoy the exploration process!