How can I see my Pokemon put in a gym?

You cannot take a defender back till the gym is beaten

A player have to put a Pokemon to own a gym. The Pokemon in the gym cannot return to the player unless the gym is taken over.

Some of players may forget which Pokemon they put in gyms, but there is a way to see their defenders.

To see the Pokemon you put in a gym, open your Pokemon storage first, and some of your Pokemon has a gym sign at the upper left of it.