Over the course of the series, did we ever see any other rooms in the girls' house besides...

the living room
the lanai
the bedrooms
the kitchen
the hall
the garage

During the series, the girls have mentioned the laundry room. It is also assumed that you can get to the garage from the kitchen, but how is that possible, since the hall and the bedrooms are there? Please help...

Also, in one episode, Sophia comes out of that little room that connects from the hallway to the kitchen, and Dorothy asks her why she was in her bathroom? How can that be Dorothy's bathroom, if her room is at the end of the hall on the right?

It's a show you guys...and a set

A bathroom was seen in that one episode when the GG decided to remodel it by themselves (or were they adding it on? I forget.)

Anyway, the rooms you listed are really the only ones the audience needs to see.

Also the front porch, if you count that as a room.

And there was a little room where they bred those minks that one time. Apparently you could somehow get in and out of the house in that room too.

That was the garage.

Are you sure about that? I seem to remember with the minks' cage room being TINY, and the episode with that old Italian guy that tries to re-do the garage, (Who, BTW, is also Mr. Bosco from another episode) the garage was much bigger.

The garage was full with stuff in the mink episode. It was cleared out so the guy could remodel it.