Note that first few color table names are preceded by a number, this allows them to be at the top of an alphabetical list. So instead of 'red'/'green'/'blue'/hot you want to specify '1red','2green','3blue','4hot'. So for your script:

gl.colorname(1,'1red')
...
gl.colorname(2,'4hot')
...
gl.colorname(3,'2green')
...
gl.colorname(4,'3blue')