Hi Justin,
Welcome aboard, sir!
Look on Taylor's website and you can see the differences in scale length, as well as guitar widths. It's all about increments, and only you can decide which is the best fit for you. I've personally not yet had my hands on a GT, but can tell you that a GC body (the 312 or any x12) is a very comfortable shape, play very well, and they sound beautiful particularly with bare fingers. And not only is the scale length at 24 7/8" shorter than the "typical" acoustics you've played (likely 25.5", your tele's scale), but the GCs are strung with lights, as opposed to many "full" sized acoustics of which many are strung with mediums.
Even more "comfy" and perhaps closer to your fit may be a Taylor 12fret model. Hard to demo as I scarcely see them on walls, but this would be my personal pick --easy first pick for me-- over either GT or GC. Not just for the feel of the guitar, but also for the bass and overall low-end roundness the 12F brings to the table. I absolutely feel it is worth finding and driving to go try out a 12F, and of course a GC-bodied Taylor. And forgive me for stating the obvious, but you may also want to consider looking at used Taylors as that will bring the prices down considerably. Hope that helps you a bit.
Edward