Bashtools
Misc bash/sed/awk/etc scripts
~/.config/dconf/user GNOME stores settings in dconf database. Copy it out to save keyboard shortcuts. (No idea how to just get those though. It's binary.)
https://askubuntu.com/questions/787451/where-does-ubuntu-gnome-store-the-keyboard-shortcuts-configuration-file
second answer lists dumping just keyboard shortcuts
dconf dump / | sed -n '/\[org.gnome.settings-daemon.plugins.media-keys/,/^$/p' > custom-shortcuts.conf # Export
dconf load / < custom-shortcuts.conf # Import