From The Encyclopedia of Comic Book Heroes
The teen-aged son of Police Commissioner James W. Gordon and his wife and, presumably, the brother of Barbara Gordon, although this is never actually stated in the texts.
In Pre-Crisis continuity, James Gordon was the biological father of Anthony “Tony” Gordon. Originally referred to as a college student, Tony later disappeared while hiding from Communist spies. He was later reunited with his sister Barbara and perished in a battle with the Sino-Supermen (Batman Family #12, Detective Comics #482). In Post-Crisis continuity, there has been no mention of Tony Gordon.
Not to be confused with JAMES Gordon, Jr.
…Who is not applicable for inclusion in this fine project because he showed up in a Batman flick:
AN OBSCURE BATMAN CHARACTER. EVERY SATURDAY. THAT’S THE HIVE OF SCUM PROMISE.