To dream that you are using the gavel means that you made up your mind about some important decision in your life. Sometimes the gavel may show that you are too judgmental when communicating with others. Sometimes the gavel could indicate the troubles if it was used not by you, but by the judged. Make sure you solve these problems, otherwise you will get yourself into trouble.
Dream dictionary: Gavel dream meanings
If you see a gavel in a dream, then such dream represents fairness. The dream could also indicate some situation you need to pay attention to. If you dream about seeing yourself suing the gavel, then you should relax, because you already found the solution to certain problem. You already know how to act in certain situation.
…Dreaming of a gavel, denotes you will be burdened with some unprofitable yet not unpleasant pursuit. To use one, denotes that officiousness will be shown by you toward your friends….