Quote:Is there anyway to run batch process on GIMP alone, without plugin, such as BIMP, G'MIC etc ?
Of course it is possible.
You have already referenced https://www.gimp.org/tutorials/Basic_Batch/ more that once. That is using script-fu to create a script. An alternative is you to create a python plugin and this method comes originally from an Ofnuts post. https://ntcore.com/?p=509
The bottom line. Can you write either script-fu or python ?
You can't ? then use BIMP and G'mic