Subtest Score Rank
Writing 600 84
Social Studies 670 96
Science 640 92
Reading 800 99
Math 590 82
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Average 660 91
The minimum passing score in each section is 450 (technically 410, although a 450 average in each section is required to pass the test as a whole.) The maximum score is 800 for each section, and the absolute minimum is 200. A score of 450 - 500 is representative of the average performance of graduating high school seniors.
The test is devised so that 60% of high school seniors would fail the GED on their first attempt.
Rank is, presumably, the percentage of graduating high school seniors across the entire US that would score lower than I. Bear in mind, I've been out of High School for five years now.
I don't believe a GPA could be extrapolated based upon the scores, however the most logical way would be to use the average score. Thus:
660 / 800 = 0.825 * 4 = 3.3 (on a 4.0 scale), or 4.125 (on a 5.0 scale)
If you go based on the average rank, it'd fall somewhere between 3.7 and 4.0.
