Here is what I was able to find:
pH- avg: 8.0, low: 7.8, high: 8.1
Hardness as CaC03-
Measured in ppm- avg: 102, low: 54, high: 220
Measured in grain/gallon- avg: 6.0, low: 3.2, high: 13
Not sure if either of those are gH, but that is all it had listed.
Also, yes Malaysian Trumpet Snail.