Ah I see, thank you for looking into that more.
What about going down the line of the link you sent earlier to the other user who had created a Gantt chart (Custom component Gantt Chart)-- this persons appears to have put labels on the bars within the chart.
Perhaps also we could modify this example case? Gantt Charts based on query results - #4 by paul.narup
They have labels on their gantt using iFrame code