Where does agirls pee come out off?

The opening of the urethra. It's located inside the labia minora, just above the vaginal opening. It's the same tube that it comes out of a boy, but without a penis.
The Urethra carries the urine as it exits the body & is a part of the hood of the external vagina. If the "top" of the vagina is closest to the front of the body & the bottom closest to the Rectum, then the Urethra is at the "top" of the vagina more or less where the vaginal "Lips" come together to form the upside down "/"