Oof, yah, the conversions b/t charts are confusing. 1 Tsp = 5mL, so 6 Tsp is 30mL per Gallon. We divide that by 3.79 (to convert to liters) and it's roughly 8mL per liter of water. This is HALF of what the GD schedule you linked says. I would certainly stick with the 'direct from website' Fox Farm Schedule, as a benchmark. These GD table numbers do not seem correct and are very high. This GD schedule is asking for 57 ml/G whereas the actual schedule from Fox farm is stating it's only supposed to be 30mL per gallon.
I would contact Fox Farm via their site and just double check these numbers. The best way to get a solid answer is to go to the source and see if there's something amiss. That being said, these charts do not match and I understand your confusion. Fox Farm will qualify this answer. Much luck brother!👍