[PD] Vertical text with GEM

[Brendan]

I want to render vertical text in GEM, i.e.
     T
     E
     X
     T

Any suggestions?  I haven't found an example and my effort to do it  
in PD is turning out ridiculously complex and difficult.  I'm OK with  
writing externals, but I haven't looked into how GEM works yet.

PDP is all right too, but preferably GEM.