I've never seen anyone wearing a glider badge on their uniform. Wikipedia says the closing date for award of the
glider badge is in '61 although qualifying events ceased many years earlier. Everyone awarded the badge would still be authorized to wear it; but, I don't think there could be anyone left on active duty. Retirees; however, are authorized to wear their uniforms on appropriate occasions and there may still be someone out there with it on theirs.
If you haven't already checked, see if it has Sterling or .925 on the back of the badge as I'm sure some were made. In my day, sterling silver qualification badges were optional, available for purchase through the PX or Clothing Sales Store. Issued badges were 5% silver filled base metal marked 1/20 SF.
During the period your badge comes from, sterling silver jewelry was sometimes Rhodium plated to keep it tarnish free and shiny though they did the same with base metal versions too. I wore an older, all shiny plated base metal version of the French parachutist badge rather than the contemporary antique finish one they issued me in France. US Army regs at the time permitted antique finish; or, "bright" finish badges though all the badges on one's uniform had to be the same.
There has always been plenty of collectors of military insignias. In some parts of the country there are militaria (military paraphernalia) shows which like gun shows, coin shows, and other hobbyist shows have a bourse and such. People there can authenticate (differentiate USGI from a period commercial copy) and elaborate on what you have.