ご苦労様です (Gokurōsama desu) also means "Thank you for your effort" or "Good job." However, it is typically used by a superior to a subordinate, or among people of equal status. Using it to a superior would be rude, as it implies the speaker is in a higher position.

目上の人から目下の人へ、労いを伝える言葉です。同僚や部下に対して使います。