This was 26.9 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 194.
100 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Gilson for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 0 | 0 |
| Regular high school diploma | 67 | 56.3 |
| GED or alternative credential | 18 | 15.1 |
| Some college, less than 1 year | 0 | 0 |
| Some college, 1 or more years, no degree | 14 | 11.8 |
| Associate's degree | 12 | 10.1 |
| Bachelor's degree | 8 | 6.7 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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