remarcable - no probs
But an easy visual cue to distinguish the GT from L are that the L has no side skirts and rear valence, as well, it doesn't have body colored moldings and mirrors. Not to mention that there's no spoiler, moon roof or hood scoop.
For everyone's info. The Dual 3" tips will not fit unless you take off your rear valence (for the GT's) It will fit cars w/o rear valence w/o probs