Yes, The Cemetary Girlz is definitely a goth band because most of their albums belong to the Deathrock genre, which is a core subgenre of goth music. Albums like Smoke My Brain, Opus Vitae, and The Cemetary Girlz are examples of their goth sound.
Some of the other goth artists that are similar to them are Horror Vacui and New Skeletal Faces.
The Cemetary Girlz is located in France, active in 2007 — present. You can find more information about The Cemetary Girlz on their GothDB band page.