Gomis J., Herrero J., Kamimura K., Roca J. Zero-curvature condition in two dimensions. Relativistic particle models and finite \W-transformations (37K, LaTeX) ABSTRACT. A relation between an $Sp(2M)$ gauge particle model and the zero-curvature condition in a two-dimensional gauge theory is presented. For the $Sp(4)$ case we construct finite \W-transformations.