Yes, Phantom Vision 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 Nocturnal Frequencies, Traces Of Solitude, and Calling The Fiends are examples of their goth sound.
Phantom Vision is located in Portugal, Lisbon, active in 2000 — present. You can find more information about Phantom Vision on their GothDB band page.
Want to check if another band is goth? Search other bands.