I say "reportedly" because I haven't seen this hit the major news services yet. The report comes from the "official" message board for the 1960s Batman TV show. It is known that Gorshin has been ill lately. He was 71. The gentleman who posted this seems to be a frequent enough poster on those boards to be taken seriously. Here's a link to that message board. This is too bad, Gorshin was wonderful as the Riddler.