old/new wiring in bathroom
#1

In my bathroom I currently have a switch to an overhead light and an outlet. I want to install a 4-gang box to house three single-pole rocker switches and a gfci outlet. One switch will go to a vanity light bar, one to an overhead ceiling fan/light, and the third to a bathroom vent fan. How do I do all of this in a four-gang box; specifically, how would I wire it all from one line in? Thanks, in advance, for any help you can provide.
#2
The incoming power black wire is connected by a wire nut to four black pigtails. Each pigtail then provides power to one of your four devices. That's all there is to it.
#3
Or a better way.... To get GFCI protection on the switches to (in case hands are wet, which they shouldn't be at a switch)
The line from the panel goes to the line connections of the GFCI, the bring out a small wire from the load side of the GFCI pigtailed to a wire to feed each switch.
The one catch - if the GFCI trips the lights go out too.

The line from the panel goes to the line connections of the GFCI, the bring out a small wire from the load side of the GFCI pigtailed to a wire to feed each switch.
The one catch - if the GFCI trips the lights go out too.