My commute is about 25 miutes between two suburbs. I wear my FD uniform to and from work, so I just put a jacket and overpants on over that: Mesh in the summer and heavier stuff in the winter. My only compromise on ATGATT is the boots. I wear thick leather steel toe lace-up boots at work so I'm comfortable riding in them. I've got a locker at the station, so I can stash my riding gear in there during my shift. When I have to travel to fill in at another station, I store my riding gear in the panniers.
R1200GS ready for work:
Boots, coat, and pants on the seat. Fire helmet, mask, workout clothes, sneakers, and toiletries in the boxes.
I do love my life!