you can download from http://www.m3eweb.it/products/ the App RAS to Excel and than copy part of the program that gets stations/elevations from .gxx file.
The DSS view in RAS splits the data by month, but you can get one of them indifferently and during computation RAS reads all the data you need also outside the month you get from DSS
I create a DEM using XS_Interpolator starting from cross sections of street and than I create the terrain in RAS Mapper using the original DEM and the one created starting from cross sections