When GDataX is used, the X-axis tick labels will be generated automatically (based on the data), and GLabels will be ignored.

If you do not specify any values for GLabels, a tick mark is still displayed at the center of each group of data elements, labeled "1", "2", "3", and so on.

You can use GLabels to label pie wedges with labels other than percentages; GPieLabels (on the previous page) must be true.

In a pie graph, percentages will be calculated and displayed for each pie wedge, with call-out lines running from each to its respective percentage. If you did not specify all the GLabels array elements, values not specified will be assigned numeric labels.

If you want to define and place your own labels to go along with the percentages, set up the pie graph, copy  "true" to GPieLabels, and then reference action GPie. Next, add an enabled key at position 0,0 in the graph region, with a very high priority. Add the labels as text.