Lambada is right as most guitar MIDI controllers track about the same. I have an old Casio MG510 Strat MIDI controller:

http://www.futureguitarnow.com/forum/index.php?topic=961.0

There are also external guitar to MIDI interfaces like the Fishman Triple Play:

https://www.bhphotovideo.com/c/product/970869-REG/fishman_119297_wireless_midi_guitar_controller_software.html/?c3api=3679%2Cbing%2C2764376398%2C1105202454813

With all guitar MIDI controllers the thinner the string the better the latency. That is because the string has to make a couple of complete vibrations so the controller can determine what note is being played. On my Casio I use .008 to .38 strings. There still is a little latency on the bass strings using them while virtually none on the treble strings. I have used this guitar may times both live and on showcase songs.

If you want a guitar like MIDI controller with absolutely no latency then you need a
Ztar:

http://www.starrlabs.com/

Not exactly a guitar but a guitar body with micro-switches for frets. Standard guitar fingering with no strings. I would love to try one someday. Probably the day after I win a lottery.

I hope this helps.

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