If you refined the variables that were associated with the ADPs then the reported SD will be in the results file. In PDFgui ou can see this by selecting the fit and then the results tab. The SD number will be associated with the VARIABLE number, but if, for example, you specified @5 for the ADP then look for the reifined result and the SD for variable 5.
On a side note, just because the program reports the SD, doesn't mean that it is right. This depends on whether the uncertainties input into the program were right or not and on whether all the assumptions behind the mathematics of the propagation of statistical uncertaintiles are good assumptions. This is discussed in more detail in the upcoming "PDF to the people" book. The SD's reported by the program often seem to be quite helpful, even when those assumptions I mention above are not well followed, but use common sense rather than just reporting on numbers reported to you by a machine.....