* School grading system: Some schools use weighted GPAs, some don't. Some use different scales (e.g., 4.0, 5.0).
* School district: Grading standards and rigor can differ greatly between districts.
* Individual student performance: Averages are just that – averages. Individual student GPAs will vary widely.
You would need to specify a particular school or district to get a meaningful average GPA for 7th graders. Even then, that number would only represent a snapshot in time and may change from year to year.