If you hear the sound of the gong in a dream, then it signifies the beginning or the end of something important in your waking life. The dream could also warn you to pay attention to something you thought of being not so important.
Dream dictionary: Gong dream meanings
In the dream to hear the sound of a gong, symbolizes false alarm of illness, or loss will vex you excessively.
Sorrowful events will stop visiting you.