ANSYS ICEM 10 doesn't convert to GTM, sometimes ;)
 

Yestarday I tried to obtain GTM output from ICEM 10. All I've got - *.cfx5 file. And when I try to output mesh again ICEM asks me if I would like to overwrite GTM file (that does not exist!) The menu was different that prior to out file to ANSYS CFX.

In PRE I successfully used ICEM input with the right untis (mm) to get the mesh from *.cfx5 file.