As an under 21 college student, I have realized that I have been focusing on night gaming random girls, which I have had some success with but being a closed system it is very difficult to get very far with girls this way. Along with never really attempting to day game girls (I'm a pretty introverted guy) and also not having the ability to night game girls I already know since I never really seem to know what to talk about when I already know them, and I am afraid to make moves because I am afraid talk of my actions will spread since most girls I know have many of the same friends I have. Because of this I usually just end up trying to game random girls. Does anyone have any advice, or could point me to a post/guide that would help my situation (I have already read the sticky'd college gaming post). Thanks.

You'll have to rely more on lifestyle and C&F attitude. You can't really be flirtatious but nothing is keeping you from annoying the fuck out of them in a funny way while keeping the too cool for school attitude.

Well the best advice is to not give a fk, but I don't think that's enough to get you to do it.
Basically this is what really happens, you spend 10 minutes alone with a girl - people already think your hitting on her. Why not actually do it? Noones going to hate you for gaming a girl. and it doesnt matter if it spreads to other girls, that'll help (as long as you dont majorly f it up). If you do something bad most of the time a girl will be to embarrassed to tell Everyone she knows. When you do it just tone down the overt (obvious) stuff and do more low key kino and talk, then get her alone and do the bigger stuff.

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To game at your best you have to be willing to do your worst.

Sounds like good advice but I also have trouble with isolating, and keeping a conversation going with girls I already know. I usually try to get girls to tell me about themselves (since as an introvert keeping conversation going isn't really my specialty), but that isn't really applicable when I already know the girl.