Calibration corrections can be examined with the task gpplt. This task can list and plot antenna gain, bandpass, delay and leakage terms. Most of the inputs are self-explanatory - see the help file for more information. Only a few parameters will be described here.
Two other options are sometimes useful. Option dots causes the plots to use small dots rather than larger blobs. This can reduce the size of plot files significantly and reduce the printing time. Option dtime causes the time axis to be plotted in decimal hours (rather than the normal hh:mm:ss). This can be useful for listings which are to be put into another package (e.g. a spreadsheet) for further analysis.