In version GLE 4.2.4-rc1, including
xaxis off
seems to kill any previously defined title. For a working example, use e.g. shadow.gle at http://glx.sourceforge.net/examples/2dplots/shadow.html
The title disappears if you add the line
xaxis off
anywhere after the line
title "Chart 1"
Easy work-around is to turn off the xaxis before specifying the title, but it still looks like a bug...
Thanks for this great software, by the way.!