As Glenn had stated, it should be possible for you to either go back to the classroom (depending on your age) or earn your diploma another way (most schools have special night classes available to obtain the credits needed to earn a high school diploma if you do not meet the age requirement to go back to the classroom).

You should either contact your local school board or talk with the school guidance counselor for direction. Your school guidance counselor should be able to evaluate your transcript to see what classes are needed for you to earn a high school diploma.

There are also High School Completion Programs that will assist in helping you obtain a high school diploma even though you have already earned a GED.

example: Green River Community College High School Completion Program

You might check with your local school board or school guidance counselor to see if there are any programs available in your area.