As with any Mech mod, your build limits are more based on your Batteries than the mod. Assuming you were to use a trusted battery (Sony VTC4-5/Samsung 25r/LG HG2) you could get away with a 0.2 ohm build, but would not be recommended for anyone unfamiliar with Mech mods.
Side Note: GLAS makes amazing mods, some of the most beautiful Mechs I've ever seen. If it wasn't for the price, I'd have one in my collection already, probably in the daily rotation too! That Sapphire Button is on point!