Usage:

$ dot -Tgd input.dot
$ dot -Tgd2 input.dot

GD/GD2

LibGD

Output images in the GD and GD2 format. These are the internal formats used by the gd library. gd2 is compressed.

Last modified September 17, 2022: Update gd.md: link to GD docs (a30cac2)