Yes, The Frozen Autumn could be partially considered a goth band because on some of their albums they played Darkwave, which is a core subgenre of goth music. Albums like Pale Awakening, Fragments Of Memories, and Chirality are examples of their goth sound.
Some of the other goth artists that are similar to them are Clan Of Xymox and Lycia.
The Frozen Autumn is located in Italy, Turin, active in 1993 — present. You can find more information about The Frozen Autumn on their GothDB band page.