GLP - Overview: Glucagon, Plasma

Diagnosis and follow-up of glucagonomas and other glucagon-producing tumors Assessing diabetic patients with problematic hyper- or hypoglycemic episodes (extremely limited utility)

GATAS - Overview: GATA-Binding Protein 2, GATA2, Full Gene Analysis, Next-Generation Sequencing, Varies

Comprehensive evaluation of the GATA2 gene in patients with clinical or immunological symptoms suggestive of GATA-binding protein 2 (GATA2) deficiency Screening family members of patients with confirmed GATA2 deficiency

GATA3 - Overview: GATA Binding Protein 3 Immunostain, Technical Component Only

Characterizing carcinomas, including primary bladder and breast carcinomas, and some types of mesenchymal and neuroectodermal tumors

GP210 - Overview: GP210 Antibody, IgG, Serum

Evaluating the risk of primary biliary cholangitis in anti-mitochondrial antibody (AMA)-negative patients by identification of gp210 antibodies Estimating risk in AMA-positive patients with incomplete feature of disease

GRANB - Overview: Granzyme B Immunostain, Technical Component Only

Classification of lymphomas

GDS - Overview: Gadolinium, Serum

Aiding in documenting previous exposure to gadolinium-based contrast agents using serum specimens

GALP - Overview: Galactose, Quantitative, Plasma

Screening for galactosemia

GLYCF - Overview: Glycophorin A (CD235a) Immunostain, Technical Component Only

Aiding in the identification of erythroid precursors in bone marrow

GAL1 - Overview: GALAD Score, Serum

Calculation of the GALAD (gender, age, alpha-fetoprotein L3% [AFP-L3], AFP, des-gamma-carboxy prothrombin) model score for hepatocellular carcinoma development in patients with chronic liver disease

LGBWB - Overview: Globotriaosylsphingosine, Blood

Screening of patients with Fabry disease when a serum specimen is not available This test should not be used for newborn screening followup.