I think you mean Golden Freddy!
Also, yes she doesn't appear in the gallery.
You need to lose to every animatronic (Freddy, Bonnie, Chica, Foxy)
Click the donut multiple times to lose to Glazed
Beat 6 Nights
Play & Beat Night 7 1/9/8/7
Play & Beat Night 7 20/20/20/20
Play & Beat Night 7 6/9/6/9