Think of SE (special edition) as a package of add ons that has nothing to do with the engine or transmission or suspension. It affects the stereo, HVAC, fog lights, head lights, wheels, tires, seats, spoiler. But all the SE stuff could be found on non SE cars. Eg, I had a 2006 that had the Alcantara seats, auto HVAC, fog lights, SE body panels, SE wheels, but wasn't a GT SE. It was just a GT.
Then GS as meaning the 4 cylinder
GT as meaning the 6 cylinder.
Yours again though doesn't appear to be an SE, unless the SE stuff has been pulled out of it. And the badge on the back again is just something someone stuck on there, it's the badge from a Lancer Evolution 7/8/9 Special Edition