I have an AML script that has instructions to import tmp files of (grid, network, basin...) is there any way to run the script in GRASS? I tried to converted to Python but I couldn't do it for the whole script.
The short answer is 'no'. AML (as the name 'Arc Macro Language' implies) is a proprietary language for ArcInfo and the calls within it are to ESRI-specific geoprocessing modules. You would have to re-write it for GRASS to call GRASS modules either wrapped in Python or as a Bash shell script. I'm sorry but I don't think there is any short-cut here which would allow you to simply import your AML automagically.