So this is the first time I've ever tamed a giga and it's only lvl 14 after tame but it's melee attack is like 20% and does not even 100 damage per hit is that normal or are they MEGA nerfed on arkfam?
Those are the normal stats of a low level tamed Giga on any official server. The Giga was nerfed about 10 patches ago. I would recommend you visit the ARK steam community forum and read up on past updates. The ArkFam.com server uses the same default settings as the official servers except for the taming, breeding, harvest and XP multipliers.