Gothic literature is a subset of Romantic literature. Thus all themes of Gothic literature can be said to belong to Romantic literature but there are themes addressed in some Romantic works which are not present in Gothic works.
The Gothic novel was a genre developed in the late eighteenth century which continued into the early nineteenth century and then was followed by such genres as the sensation novel. The term Gothic referred to the Goths, or medieval "barbarians" who were in part responsible for the downfall of the Roman Empire and were forerunners of the modern French. In literary criticism, the term thus referred to novels with medieval themes or settings. These novels usually had elements of horror and the supernatural. The main characters were aristocrats and clergy and the settings tended to be exotic.
While both Gothic and other Romantic works display appreciation of nature, the Gothic works often show nature as foreboding as well as displaying beauty and grandeur while in the Lake poets, for example, nature is more benevolent. The Gothic does not have the pastoral themes and treatment of peasant life as idyllic that is seen in other forms of Romantic literature nor does it valorize childhood in the manner of Wordsworth. Also, many Romantic writers but not the Gothic novelists were concerned with the role of the poet in society.