| G17DT | gastrin immunotoxin |
| G9 209-2M | gp100:209-217(210M) peptide vaccine |
| GAA peptide-pulsed autologous dendritic cell vaccine | glioma-associated antigen peptide-pulsed autologous dendritic cell vaccine |
| GAD | generalized anxiety disorder |
| GaM | gallium maltolate |
| GaN | gallium nitrate |
| GAPPS | gastric adenocarcinoma and proximal polyposis of the stomach |
| GBM | glioblastoma multiforme; grade IV astrocytoma |
| GBM multi-antigen vaccine IMA950 | glioblastoma multiforme multipeptide vaccine IMA950 |
| GBS | Guillain-Barré syndrome |
| GC1008 | anti-TGF-beta monoclonal antibody GC1008; fresolimumab |
| GcMAF | globulin component macrophage-activating factor |
| GCP | Good Clinical Practice |
| G-CSF | filgrastim; granulocyte colony-stimulating factor |
| GCT | giant cell tumor |
| GD | galactomannan derivative |
| Gd-BOPTA | gadobenate dimeglumine |
| GDC-0449 | Erivedge; vismodegib |
| Gd-DTPA | gadopentetate dimeglumine; Magnevist |
| Gd-DTPA-BMA | gadodiamide |
| Gd-EOB-DTPA | Gadoxetate Disodium |
| GDT | gamma-delta tocotrienol |
| Gd-Tex | motexafin gadolinium |
| GEMOX | gemcitabine-oxaliplatin regimen |
| GEP-NET | gastroenteropancreatic neuroendocrine tumor |
| gFOBT | guaiac fecal occult blood test; guaiac smear test; stool guaiac test |
| GG745 | Avodart; dutasteride |
| GGTI-I | geranylgeranyltransferase I inhibitor |
| GI | gastrointestinal |
| GIST | gastrointestinal stromal tumor |
| GITRL RNA DC | GITRL RNA-transfected autologous dendritic cell vaccine |
| GITRL/antiCTLA4 RNA DC | anti-CTLA4 mAb RNA/GITRL RNA-transfected autologous dendritic cell vaccine |
| GLE/PIB | glecaprevir/pibrentasvir |
| Gln | glutamine |
| GLO-GM2-LE-MUC1-sTN-TF-TN-KLH | Globo-H-GM2-Lewis-y-MUC1-32(aa)-sTn(c)-TF(c)-Tn(c)-KLH conjugate vaccine |
| Gly | glycine |
| glycosylated rhG-CSF AVI014 | glycosylated recombinant human G-CSF AVI-014 |
| glycosylated rhIL-7 | glycosylated recombinant human interleukin-7 |
| GM CSF | sargramostim |
| GM1 | monosialotetrahexosylganglioside |
| GM2-KLH | GM2-KLH vaccine |
| GM.CD40L | GM.CD40L cell vaccine |
| GM-CSF | granulocyte-macrophage colony-stimulating factor; sargramostim |
| GM-CSF BREAST VAC | allogeneic GM-CSF-secreting breast cancer vaccine |
| GMV | Tag7 gene-modified vaccine |
| GnRH | gonadotropin-releasing hormone; luteinizing hormone-releasing hormone |
| GnRHa | GnRH agonist; gonadotropin-releasing hormone agonist; LHRH agonist; luteinizing hormone-releasing hormone agonist |
| GNS | granisetron hydrochloride nasal spray |
| GNX | ganaxolone |
| GRAN | granisetron hydrochloride |
| GRPs | allogeneic glial progenitor cells |
| GSD | glycogen storage disease |
| GSE | grape seed extract supplement |
| GSH | glutathione |
| GSK1070916A | Aurora B/C kinase inhibitor GSK1070916A |
| GSL alpha-GAL | alpha-Gal glycosphingolipids |
| GTD | gestational trophoblastic disease; gestational trophoblastic tumor |
| G-TPP | gamitrinib |
| GTT | gestational trophoblastic disease; gestational trophoblastic tumor |
| GVHD | graft-versus-host disease |
| GW572016 | lapatinib ditosylate; Tykerb |
| GW786034 | pazopanib hydrochloride; Votrient |
| GWAS | genome-wide association study |