Gyökeres was loaned to St Pauli last season and now Swansea are keen.
"He really is a player we like," Cooper told BBC Sport.
"But he is often used in Brighton right now for the Cup matches. If there comes a time when Brighton are happy to loan him out - which I think they may have said publicly, I'm not sure - and they think we would be a good alternative, then that would be something we would like to do.
"But whether it will be like that or not, I'm not so sure yet."