Simple "setText" clock face question

I'm new to Monkey C (and a non-pro programmer) and cannot get text to append to the end of my time.

I just want the letters "GMT" to come at the end of this line:

var zuluTime = Lang.format("$1$:$2$", [zCalc, clockTime.min.format("%02d")]);
var Zview = View.findDrawableById("zTimeLabel") as Text;
The clock face works without any label.  I've tried putting "GMT" in all kinds of locations.  This usually returns 3 blank boxes in the correct location.  I've tried defining a string variable and inserting it similarly.  I know the time is numeric and my label is string and experimented with the strings function but only managed to crash things.  I do not know how to get them to get along. 
Any help would be appreciated.
Thanks,
Jeff