What is Advance Pay and how do I request it? If you are a first time student using GI bill benefits or have used the GI Bill before and been out of school for a semester you can request Advance Pay. We accept requests for Advance Pay 60 to 90 days prior to the beginning of the semester.hat is Advance Pay and how do I request it? If you are a first time student using GI bill benefits or have used the GI Bill before and been out of school for a semester you can request Advance Pay. We accept requests for Advance Pay 60 to 90 days prior to the beginning of the semester.