It was a tough germination. Dropped 2 seeds originally. Soaked 24 hours in a glass of filtered tap at 200ppm. Placed them in my paper towel setup; in the dark, 79f, 50-60 humidity. 3 days no sprout so I dropped the third seed in same water conditions. Third soaked 24 hours then went into the same paper towel environment as the other two. On the seventh day I had one sprout and that went into the soil mix.
I've grown three other GCS plants with no germination troubles. This was unique to me as the seeds that still have not sprouted were much smaller than the seed that did sprout. Smallest seeds I've seen so far.