City conceded the Premier League title to Liverpool last week, but remain alive in the FA Cup and Champions League.
"It is definitely exciting," Gundogan said. "We still have two great competitions that we can win. We are playing to win it so that is our aim. It is not going to be easy but I think we have a chance to win both.
"Obviously, we have to improve still and play well because there is no room for mistakes, you have to be crucial. These games are crucial."