Functional method for solving gravitational field equations

A new method for solving equations of the gravitational field (G-field), which is based on functional transformations (FT) replacing holonomic transformations of coordinates, is given. The method is equivalent to nonholonomic transformations of field functions and it permits to construct a great number of new solutions in the same coordination containing the proper number (up to 12) of arbitrary functions using the certain solution. The FT method can be used for solving the Cauchy problem for a nonstationary G-field, for elimination of the field peculiarities, etc