There are a variety of synonyms for the phrase "gets involved." One option is "participates," which suggests actively taking part in a situation or activity. Another synonym could be "engages," which implies a willingness to interact with others or an idea. Alternatively, "immersed" connotes becoming fully absorbed or deeply involved in something. "Commits" implies making a dedication or pledging oneself to a cause or endeavor. "Joins in" suggests a willingness to become a part of a group or activity. Lastly, "throws oneself into" implies a passionate, whole-hearted involvement in a situation or task. Each of these synonyms can lend a subtly different connotation to the act of involvement.