Its good to make clear some facts:
1. Compiler - Greenhills, S32DS, Windriver, etc...
2. Debugger - Lauterbach, iSystem, PEMicro,Greenhills probe, etc...
To load elf file you need a debugger which you connect to microcontroller. If you don't have Lauterbach you can use any other debugger to lead *elf file.
The debugger I use is PEMicro. I mean is it possible to use S32 Studio or GreenHills to do the work what Trace32 does(import the *elf then download it to my target)