Notice "journalists" use "gonna" when quoting Palin? 0bama also says it, but I've never seen that in a direct quote of him.
Not just "gonna" but "gonna to", which really makes no sense. The whole point of using "gonna" is slurring "going to" into one word.
Palin does not talk like this, so I'll have to assume the typist does.
Good catch. The leftist media will use every conceivable tactic in their war on Sarah, most of them far less subtle than the one you caught.