The paper considers the technique of calculation of steady state pressure and flow distribution of raw gas in gas gathering networks of gas fields, providing a given level of total production from wells and satisfying technological limitations in the form of boundary conditions. Since the group gathering schemes using the internal energy of the gas at the well head are treelike configurations of gas pipelines, the solution of the general problem of choosing a stationary mode is reduced to solving a sequence of one-dimensional nonlinear equations with a monotonic function of an unknown argument by recognized highly efficient methods.