The Genetic Support Network of Victoria provides support and resources for individuals and families affected by genetic, rare, and undiagnosed conditions, facilitating connections and access to services.

The Geneva Centre for Autism provides programs and services for individuals with autism, including support for children, teens, and adults in areas such as communication, life skills, and social engagement.

The Gerontological Society of America is dedicated to advancing the field of aging through education, advocacy, and research, providing resources and networking opportunities for professionals in gerontology.

Roswell Park Comprehensive Cancer Center is a leading cancer treatment facility that provides comprehensive care, innovative treatments, and survivorship programs for various types of cancer.

Give an Hour is a national organization dedicated to transforming mental health by providing support to individuals impacted by human-made trauma through innovative and empowering approaches.

The Glaucoma Research Foundation is dedicated to funding research and providing resources to help patients understand and manage glaucoma, with a focus on finding a cure.

The Glioblastoma Foundation focuses on funding research and developing drug therapies for glioblastoma, aiming to transform the standard of care for this aggressive brain cancer.

The Global Foundation for Peroxisomal Disorders supports families affected by peroxisomal disorders, including Peroxisome Biogenesis Disorder-Zellweger Spectrum Disorder, by funding research and providing educational resources and support services.

GHLF is a patient advocacy organization that supports individuals with chronic conditions, particularly arthritis, by providing education, resources, and a platform for patient voices in healthcare.

Global Liver Institute empowers patient advocates to collaborate with policymakers and clinicians to improve liver health and address liver diseases.

GRASP is a non-profit organization that supports the Autistic and Neurodivergent community by providing affordable autism assessments, coaching, and consulting services.

The GLUT1 Deficiency Foundation supports the GLUT1 Deficiency community through awareness, education, advocacy, and research, aiming to improve diagnosis, treatment, and quality of life for those affected by this rare genetic condition.

The Gorlin Syndrome Alliance supports individuals affected by Gorlin syndrome through education, research funding, and community connection.

Grace Science Foundation is dedicated to finding a cure for NGLY1 Deficiency and supports research that may benefit those suffering from various diseases.

The Graves' Disease and Thyroid Foundation empowers patients living with Graves' Disease and Thyroid Eye Disease by providing expert-vetted resources and a supportive community.

The GRIN2B Foundation supports individuals affected by GRIN2B-related disorders by providing resources, information, and a patient registry for research and community engagement.

Guide Dogs of America provides service dogs for individuals who are blind/visually impaired, veterans, and children with autism, enhancing their confidence, mobility, and independence.

Guiding Eyes for the Blind provides guide dogs to people with vision loss, offering all services completely free of charge.

GAIN Charity is dedicated to supporting individuals affected by Guillain-Barré Syndrome (GBS), CIDP, MMN, and other related inflammatory neuropathies, offering services such as peer support, personal grants, and information resources.

Gut Check Foundation is a nonprofit organization dedicated to promoting education and research on the prevention and treatment of Clostridium septicum infections, particularly in immunocompromised individuals such as cancer and diabetes patients.