No, your girlfriend on grand theft auto 4 can't move in with you.
There are so many of them, it can be difficult to track them all down. If you refer to the excellent gtawiki site, this should give you information on how to find them:gta.wikia.com
how have a girlfriend
You can't get a girlfriend in Grand Theft Auto 3 but in Grand Theft Auto San Andreas you can. Answer You can have 3 altogether I think in Grand Theft Auto San Andreas.
You don't.
after you have a girlfriend, go to her house
yes
No but you can have girlfriend and have coffee
kill your first one
You have to unlock driving school
Umm yes you could
Mine isn't but maybe someone out there has one like that