National testing services are required to provide reasonable accommodations, and most have information on their websites about how to document disabilities and how to request accommodations. However, students must submit documentation well in advance.
The General Equivalency Diploma (GED) tests measure a student's knowledge and academic skills as compared with those of traditional high school graduates. To find out about requesting accommodations for the GED, visit the GED Testing Service Accommodations for Candidates with Disabilities  website. Accommodations must be requested through the local GED testing centers.
-  GED Testing Service Accommodations for Candidates with Disabilities