G-code generate for 3D printer using CREO

HI

I am Using Creo3.0 and i need to pass the G-Code to my 3D printer. Normal way is Pass the .STL file to the 3D printer software and that software will define the how to build the print using merlin post processor.

But in my case, I need to define the printing pathway using CREO. is there any method pass the G code that compatible with the 3D printing software. or is there post processor generate G code for "merling".

or please help me to generate my own tool path for 3D printing