Judgments are not listed under the adverse credit items that cause a GradPLUS application to be rejected. I also contacted the GradPLUS credit center and they said that judgments wouldn't cause a rejection, but I find it hard to believe.
Does anyone have a recent experience of applying for a GradPLUS loan with an unpaid judgment on the credit record and getting approved automatically? I have no derogatory credit items on the report at all, except for the judgment.
Because it's not an automatic disqualifier, I would expect it to be considered in the wider picture of your overall file and score.
The best way to find out is to apply.