I actually had no idea that Gap did anything other than slap some clothes on some mannequins in the window and call it a day. I thought they'd be too busy moving clothes around inside to bother with a window. I was wrong. They have what look like pantone chips behind the mannequins.
The kid's windows are a lot more involved. They have paint sticks in pinwheel shapes in front of a picket fence/boardwalk thing. There are also jelly sandal flowers and shorts hanging.
I think it's nice but a bit busy. There's too much to see so you almost see nothing. Perhaps without the jelly sandals it would be a lot more successful. Even the pinwheels and mannequins by themselves would be great, and simple as the paint chips in the adult window is.