Gassho is more than a pose. It is symbolic of the Dharma, the truth about life. For instance, we place together our right and left hand, which are opposites. It represents other opposites as well: you and me, light and dark, ignorance and wisdom, life and death.
Gassho also symbolizes respect, the Buddhist teachings, and the Dharma. It also is an expression of our feelings of gratitude and our inter-connectedness with each other. It symbolizes the realization that our lives are supported by innumerable causes and conditions. (Ken Yamada, of the Berkeley Higashi Honganji Temple).