Having the G-Major mixed in parallel also means having it on kill-dry, which puts some limitations on it. Here is an excerpt from the manual:
"Kill Dry Settings: On/Off
We always recommend using G-Major 2 in a serial or loop setup as this will allow you to benefit from all the unit’s effects and features. If, however, you intend to use G-Major 2 in a parallel setup or in a parallel loop, its Kill Dry function will come in handy. With Kill Dry activated, no direct signal is passed to the outputs of G-Major 2.
A few comments regarding the Kill Dry function and a parallel setup:
First of all:
• In such a setup, we recommend using the Parallel routing.
• When the Kill Dry parameter is set to “On”, no clean signal is passed to the outputs, and the “Mix” parameter changes to “Wet” in all algorithms.
You should also be aware that the way the signal is routed in a parallel loop is similar to the signal path within a mixer. The signal is split: One part runs unprocessed to the output and never passes the actual effects processor. The other part of the signal is processed within G-Major 2 and summed with the unprocessed signal. Therefore, you will not get to enjoy the benefits from all effects when running a parallel setup. This goes especially for level-based effects such as Tremolo and Panner, but the Chorus/Flanger/ Phaser/Vibrato and Pitchblocks will be affected as well."