I haven’t seen project with galileo using that specific dongle. I suggest you to first check the drivers/modules/packages required for any dongle you may want to buy in order to be sure that is available for the kernel and yocto version in the Galileo.
Take a look at this thread: Setting up a Galileo Gen 1 to work with a Realtek RTL8188CUS USB Wireless Adaptor It may be helpful for you.
Is there a USB Wifi Dongle that is conformed working with the Galileo Gen 2?
There isn’t an official list of dongles that have been tested with the Galileo Board. I suggest you to look into the drivers required for the dongle in order to enable them in the image.
I suggest you to check the following threads: