This was 10.1 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 387.
88.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Gilman for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 27 | 11.6 |
| Regular high school diploma | 95 | 40.8 |
| GED or alternative credential | 10 | 4.3 |
| Some college, less than 1 year | 16 | 6.9 |
| Some college, 1 or more years, no degree | 20 | 8.6 |
| Associate's degree | 49 | 21 |
| Bachelor's degree | 8 | 3.4 |
| Master's degree | 8 | 3.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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