Yes, Selofan is definitely a goth band because most of their albums belong to the Darkwave genre, which is a core subgenre of goth music. Albums like Verboten, Tristesse, and Στο Σκοτάδι are examples of their goth sound.
One of the other goth artists that is similar to them is Lebanon Hanover.
Selofan is located in Greece, Athens, active in 2012 — present. You can find more information about Selofan on their GothDB band page.