No, it's not a military acronym. This is a shout out of thanks to AF mom Deb, who helped me with GSA = Graphic Snitching Assistance, in order to get his Faboo graphic you see <--- where it says Proud AF mom.
"General Staff officers were so out of touch with the requirements of modern aerial warfare that their chief complaint about air personnel was the disrespectful manner in which flying officers flouted regulations by refusing to wear their cavalry spurs while flying airplanes." USAF Professional Development Guide, History of the AF, Sect. 2.5.3