Provided herein are antibodies that specifically bind to GITR. Also described are related polynucleotides capable of encoding the provided GITR-specific antibodies or antigen-binding fragments, cells expressing the provided antibodies or antigen-binding fragments, as well as associated vectors and detectably labeled antibodies or antigen-binding fragments. In addition, methods of using the provided antibodies are described. For example, the provided antibodies may be used to enhance an immune response in a subject against cancer.