By comparing his photos plastic surgeon dr. Frank ryan had made this appearance the result of facelift surgery. You can see he is in this age is still fresh, glowing and there is no even a single wrinkle on his face that can make us realize that what is his actual age. See the images below and make your own comparison and determine that if gene simons has had facelift surgery or not.
Gene Simmons Plastic Surgery before and after pictures facelift. But you are also intimated that there is no any evidence except his before and after photos that can make is true this story of his face lift surgery.