@echo off
cd /d "%~dp0"

exiftool ^
  "-AllDates<DateTimeOriginal" ^
  "-CreateDate<DateTimeOriginal" ^
  "-ModifyDate<DateTimeOriginal" ^
  "-TrackCreateDate<DateTimeOriginal" ^
  "-TrackModifyDate<DateTimeOriginal" ^
  "-MediaCreateDate<DateTimeOriginal" ^
  "-MediaModifyDate<DateTimeOriginal" ^
  "-FileModifyDate<DateTimeOriginal" ^
  "-FileCreateDate<DateTimeOriginal" ^
  -o "%%d%%f_date_corrected.%%e" ^
  *.GPR

echo.
echo Done! Originals preserved, new files have "_date_corrected.GPR" in the name.
pause