Travis, my use of the GW has been limited to warm weather SUL trips, including a 4 day in Maine where it was my only stove, and was used for 2 meals a day.
That being said, I have received numerous reports from those who have used it during winter, but that was primarily just for heating tea water, etc. B/c of it's small size it is very sensitive to temperature, so it's important to keep the stove and fuel warm before use and use a windscreen (resonably tight to keep the stove warm while it's lit), although that's SOP with any alky stove. Conversely,in summer a looser windscreen is better to prevent flaring.
Maybe some brave sole out there who's used one in winter can chime in?