A common issue that presents itself to many GalliumOS users is the lack of 'palm detection' as well as the lack of 'disable touchpad for a moment while typing' - if you have had frustration dealing with the touchpad in GalliumOS, there is a way to fix this and get 'Near stock ChromeOS' behavior.
This guide will assume that your hardware is equipped with a 'Elan' touchpad. Nearly all Chromebooks use this hardware, however - some do not. The following tweaks will likely work regardless, however your experience may vary.
Before you start
We will be making changes to the input system. It's advised that before you begin this process, you have a backup of anything critical - just in case.
To start off, we are going to need to install libinput. Open up a terminal, and issue the following command:
sudo apt install xserver-xorg-input-libinput
This will install libinput on your system, and configure it with the default settings.
Your output will look something like this: 
If you choose to reboot or restart your xorg session at this point before configuration, do so at your own risk - I recommend that you follow along with this guide and configure the input before rebooting.