GEO is basically SEO plus clarity. The basics still carry the weight: crawlability, links, on-page work. What you add is clear answers up top, a stat or source, and simple details like who wrote it and when.
Throw in a HowTo or FAQ tag if it fits, and back it with something original like a chart or screenshot. You will know it is working when answer engines start citing you or your snippets show up more often.