Yes, Seraphim Gothique is definitely a goth band because most of their albums belong to the Gothic Rock genre, which is a core subgenre of goth music. Albums like The Halo Hits the Floor and Desertsun are examples of their goth sound.
Seraphim Gothique is located in United States, Texas, Dallas / Fort Worth, active in 1994 — present. You can find more information about Seraphim Gothique on their GothDB band page.