On an answer that isn't me trying to kill people over the internet:
If you were a normal person without The Gamer CIF isn't a naturally meditative action because you are actively splitting your attention between multiple things, namely channeling chakra and fighting. If you went out of the way and tried to use CIF while meditating you would be technically be training CIF itself instead of properly doing a meditation.
As a Gamer CIF is a toggle skill that you turn on/off without effort in maintaining it, the same way that you normally doesn't pay attention to the way you walk or breath. Sitting down calmly to try and train CIF would simply train CIF normally.
The closest to a meditative action you have right now is Leaf Sticking Exercise since the default method to train it is to focus on the leaf on your forehead and make it stick, and then when you get better you can try and split your attention into other things.