The Catechetical Directory
of the UGCC was published in 2000 and is available from several sources, including the St. Josaphat Eparchy's bookstore http://www.stjosaphateparchy.org/Store.html
The UGCC Catechism is being developed by the Patriarchal Catechetical Commission led by His Grace Bishop +Peter (Stasiuk).
Until then there is no official catechism, although in English the most often used is Fr. Casimir Kucharek of blessed memory's Our Faith
and The Sacramental Mysteries: A Byzantine Approach
. Fr. Casimir was a priest of the Eparchy of Saskatoon. These are solid books and still hold up quite well; I brought my older kids up with these.