The new header in the messages.yml file contains instructions on how to create your own.
Code (YAML):
# This is the Message file for all GPS messages.
#
# All messages are fully customizable and support color codes, formatting and ASCII symbols.
# Set the Prefix/ConfPrefix and use %prefix%/%confPrefix% to add the corresponding prefix to a message.
# Leave a message blank ('') to disable it.
#
# You can also create messages with Hover and Click events. Syntax options: (Space between comma and quote is NOT allowed)
# - ["Message","/Command"]
# - ["Message","Hover"]
# - ["Message","Command","Hover"]
# You can add as many events to a message as you want. Example:
# '%prefix% &cInvalid arguments! ["&c&n&oHelp","/gps help","&aClick to get help!"]'