It is possible but there hasn't been any need to do it. Mainly because it's a nightmare to design, construct, use, and maintain. Compared to the wings of small military aircrafts, commercial airliners have considerably bigger and heavier wings, that carry huge amounts of fuel.

Given that most airports usually don't have parking issues, it's really a no-brainer to dismiss the idea altogether. Why get an expensive and complex fix for a problem that doesn't exist or that occurs once a month?

Boeing is only doing it on the 777X in order to fit in the 80x80 box, not to actually save space.