GI Joe's backstory has undergone more than one change over the years, and according to multiple sources I just turned up, the Mitchell Paige GI Joe figure was and is part of a special series honoring Medal of Honor recipients from each service.
GI Joe did start out as a soldier figure, but, for example, in the 1970s, when I was growing up... the military aspect was downplayed, and the GI Joe Adventure Team was the theme behind the toy.
Later still, in the late 80s or so, they brought out the more current version, with Cobra Commander, and the literally dozens of different figures, each with their own backstory and history. (Off the top of my head, I don't recall this version really being definitely linked to the US government.)
So... this new movie idea isn't that bad. Yeah, I'd like to see them leave GI Joe based in the US, promoting the American Way, and so on... but movie producers also have to plan global marketing, too.