We are replacing the tile and backerboard around our shower. . .when we pulled the old gypsum board down, we realized that the back side of the outlet in one of the bedrooms is right behind the shower wall.

I figure we have 3 options:

1) leave it -- things were dry back there and will remain dry; we are also putting a vapor barrier over the studs to keep moisture from getting into the wall.
2) remove the outlet and route the wires up over the top edge of the shower
3) put a different type of box over the outlet; some type of waterproof box or maybe change it to a GFCI outlet?

Thanks for any help or suggestions!

There is a photo of it here: