GuitarGym is an amazing resource, but how do you use it most effectively?

If you are not careful, it just becomes games to play, and you are not learning the guitar.

The hands-on section is very useful for preventing this, especially if you are using it effectively. I personally enjoy playing songs by playing along with YouTube chord/lyric videos under the play a song tab.

But what is the reason for the games?
If you use music theory and the games it allows you to figure out more complex chords or inversions in the blink of an eye. e.g. if I see a g Maj-7 I can go to the g shape on any of the positions and flat one of the root notes by 1 semitone. Or if I see a sus2 I can flat the 3, if I see a add-9 I can sharp one of the root notes by 2 semitones, etc.

This is when chorductor, fretmaster, chord maze, and chord puzzle show their merit. They allow you to do chord theory exercises in a guitar context like finding out the half diminished 7 chord of an Eb, without memorizing its individual shape in every position, by manipulation of the E shape at any position. Knowing this also allows you to the chords around it to different positions to facilitate playing.

Of course, you cannot do this without basic chord knowledge, but if you have that, a guitar, and time to spend, anyone can master the guitar at least for chords, and with GuitarGym do it faster.

GuitarGym helps speed up learning because it allows you to practice the mental side of the guitar without hurting your body, if you just play the guitar too long you can cause injury, and your learning is slowed down or you have to stop.