Are you talking about different Gothic texts and how they vary depending on their origins, or the use of geograpy in Gothic literature? If it is the second, then it is important to note the important impact that setting has in Gothic literature. Gothic works almost always are set in a geographical location that is on the fringes of civilised mankind, which of course is vitally important for the kind of action that occurs in these places. Consider Wuthering Heights, for example, and the way that the entire action of the novel takes place in an exposed part of the Yorkshire Moors that is separated from the rest of humanity and is open to the full force of the elements. We see humans on the edge of civilisation, which perhaps explains how they are able to act in such shocking ways.