Galliano does not need to be refrigerated. Galliano is a liqueur that is made from a variety of herbs and spices, such as vanilla, anise, and citrus. It has a relatively high alcohol content, typically around 42.3% alcohol by volume. This high alcohol content acts as a preservative and helps to prevent the growth of bacteria or spoilage.
I have personally kept a bottle of Galliano on my liquor shelf for several years without refrigeration, and it has remained perfectly fine. The flavors and aromas have not diminished, and there has been no noticeable deterioration in quality.
However, it is important to note that while Galliano does not need to be refrigerated, it is still recommended to store it in a cool, dark place. Exposure to heat and sunlight can potentially degrade the flavors and quality of the liqueur over time. So, if you have a cool, dark area in your home, such as a basement or a cupboard away from direct sunlight, that would be an ideal place to store your Galliano.
While Galliano does not require refrigeration, it is best to store it in a cool, dark place to maintain its quality over an extended period.