Clark decided to focus on the high school after her meeting with Gay, who, as a member of the Somerville School Committee from 1986 to 1993, instituted an AIDS curriculum and a program making condoms available at Somerville High School.
The high school will be the site of an official reception on Feb. 3, when Gay will introduce the community to its new gay liaison.
In appointing Clark, Gay is continuing a position instituted by U.S. Rep. Michael E. Capuano (D-Mass.) in 1996, during his tenure as Somerville mayor. Gay replaced Capuano after winning a special mayoral election last May.
Clark wouldn't say whether her new position indicates that a career in elected office is in the works.
"I'm not ruling anything out," she said, "but in the meantime, I'm not smoking any marijuana."