If you're talking about the glitch that allows Sonic to move faster, that's already being used for a while, to do an full level screen warp in that exact same level :)

if you talking about getting sonic to move faster and jump higher - that is actually not a glitch - you get these properties when you enter the gun and lose them when you leave the screen. this has already been used in both any% and glitchless for quite a while

Glitchless runs don't use it, because it is 100% a glitch.