No pure specimen I've ever seen, nor has any reputable guide I've ever seen mentioned such coloration. In my experience, they're always dark with a light margin, which is how I've always seen them described. Source for a description of greens with red on the operculum?
It's not a hybrid green sunfish. Also the red on operculum isn't that bright red compared to Pumpkinseed and Redears. It's really common for pure green sunfish have pink operculum. In my experience, I see no hybrid traits in this green sunfish.