/usr/share/gnome/autostart/dhcpcd-gtk.desktop is in dhcpcd-gtk 0.6.0-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [Desktop Entry]
Name=Network Configurator
Comment=Configure and monitor your network connections
Exec=dhcpcd-gtk
Icon=network-transmit-receive
Terminal=false
Type=Application
X-GNOME-Autostart-enabled=true
|