To get Gaucher disease a person must have two copies of the mutated gene. A person with one normal and one mutated gene is a “carrier” of Gaucher disease and will not have the condition, but there is a 50% chance that they will pass the mutated gene onto their offspring.
Many different mutations of the gene for glucocerebrosidase have been identified. The type of mutation is connected to the severity of Gaucher disease. Carrier testing is possible in affected families. If you are interested discuss this with your treating doctor.
The risks are for each pregnancy. Whilst this means that there is a 1:4 chance each of an affected or unaffected child and a 2/4 chance of a carrier, in fact, as each pregnancy is independent by chance all off spring may be affected or unaffected.