This package is an R Commander "plug-in" based on the GWRM package (see GWRM). It provides a GUI for fitting a generalized Waring regression model to a dataset, together with other common regression functions such as Akaike and Bayesian information criteria, stepwise model selection or add observation statistics to data. Moreover, it allows for computing the partition of the variance for the selected GW model and carrying out a graphical diagnosis by a simulated envelope of the residuals.