The G-Spot is only a couple inches in, behind the ribbed-feeling part on the front wall of the pussy. Easiest way to make a girl squirt, and I really shouldn't be giving away my technique, but hey, if I can make a few more women scream and slosh, I will...
-start out with a good few mins of oral, deep french kissing and sucking of her clit ---- with no penetration (fingers, dildo, nothing), if you can make her come, good, if not, that's okay
-continuing oral, insert one finger and gently drag your finger all around, so that you are hitting the back, sides and front of the inside of her pussy.
-move up to 2 (3 is good too) fingers and make a "come here motion", ensuring that you are giving firm, but not rough pressure to the ribbed portion I mentioned earlier. Slowly increase pressure, unless she asks you to stop. too much pressure too soon will hurt her.
-eventually you will be able to bang her free style with your fingers in the same place you've been rubbing firmly, but make sure your fingers are angled so that they are continuously hitting that front wall.
-then, as she starts to come, milk it!!!! drag your fingers firmlydown the front so that you get every last drop of all the juice that comes gushing out. You may wanna lay a towel down.
For me, I like long hard licks and firm sucking to my clit, for others it will be different, just ask! There is not one girl who I've eaten out who didn't squirt/gush from this technique.
xxoo
Miss Suzy Jean