The boot logo for GNUBoot is copyright 2023 Jason Self and released under the CC-0 license.
The grey backgrounds with it were made by Adrien ‘neox’ Bourmault in 2023, and are also released under the CC-0 license.
The logos can be found in the resources/grub/background/ directory in the GNU Boot source code.
Markdown file for this page: https://gnu.org/software/gnuboot/web/logo-license.md