The way the GSS Darts are listed in that ad I would think they were left over 68s. They are separated with a border from the listed 1969 cars and let's not forget Mr Norm was one of the best marketing men.
Knowing Norm - He just called the 69's GSS's to keep that "exclusive" 1968 feel around the cars. Truth is - he ended up selling many of the 69 440 Darts anyway as Chrysler was having trouble marketing them.
