Since I am capable of changing up gauge in the short period after knitting one sleeve and starting the next one, gauge is a difficult area for me and one that I'm working on to try and smooth out.
But technically, the answer is yes, as many knitters do change gauge over periods of time, a change of needles, seasons of the year, whether there's hot chocolate in the mug or beer in the fridge, phase of the moon, whether the cat's wanting to be fed...you know.
