Find metadata.

> exiftool image.jpg

Find info on all images in current directory.

> exiftool -ext .png .

You can make this recurring with the -r switch.

And overwrite all metadata:

> exiftool -all= -overwrite_original -ext jpg .

Or just GPS data:

> exiftool -gps:all= *.jpg

You can also use the imagemagick tool:

> identify -verbose