Each candidate has to submit an application detailing their project, including a detailed project plan, timeline and budget as well as a personal motivation for why they should be selected as a GELS scholar. (If you are applying together with a fellow student, one application per project). The project plan should clearly detail what you want to achieve with your project.
The best applicants are selected for a one hour interview with former GELS scholars (many whom are ex. consultants so expect a similar format to what you’d find at a consulting firm) where you are expected to further demonstrate why you would be a good GELS scholar.