- G6PD, Profile
- Gabapentin
- Galactomannan
- Gamma Glutamyltransferase
- Gastrin (Serum)
- Gaucher Disease, DNA Mutation Analysis
- GBM Antibody
- Gentamicin
- GFR
- GGT
- GH
- Giardia
- Glomerular filtration rate
- Glucocerebrosidase
- Glucose (Serum)
- Glucose (Urine)
- Glucose Tolerance
- Glucose-6-Phosphate Dehydrogenase, Profile
- Glycated Hemoglobin
- Gram Stain
- Granulocyte Count
- Growth Hormone
- Guaiac