The Gong Chik has been taught often at the Tibetan Meditation Center. I saw a spiral bound copy of the commentary which includes a translation of the root text. As in the case of many root texts, it is brief and won't stand on its own without a commentary. I don't know the availability of the commentary, it might be sold out. There are several traditional commentaries by Drikung masters. It is these which have not yet been translated into English.
This is my personal opinion, but I believe teaching the Gong Chik was part of Chetsang Rinpoche's program for rehabilitating the Drikung. Many Drikung were studying texts from other lineages (jamgon Kongtrul, Mipham, etc) and he wanted to emphasize texts that were distinctively Drikung.
Having obtained the supreme freedoms
and conjunctions of the precious human existence,
endowed with faith, energy, and intelligence,
Having attended on a worthy spiritual friend
and received the pith of the holy instructions,
May we practice these properly, just as we have received them,
without obstacle or interruption.
In all our lives, may we practice and enjoy the holy dharma.