Yes, The Agnes Circle 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 Some Vague Desire and Modern Idea are examples of their goth sound.
One of the other goth artists that is similar to them is Forever Grey.
The Agnes Circle is located in United Kingdom, England, London, active in 2015 — present. You can find more information about The Agnes Circle on their GothDB band page.