What does GN RH stand for?

Gonadotropin-Releasing Hormone

Gonadotropin-releasing hormone, also known as follicle-stimulating hormone–releasing hormone, luteinizing hormone–releasing hormone, gonadoliberin, and by various other names in its endogenous form and as gonadorelin in its pharmaceutical form, is a releasing hormone responsible for the release of follicle-stimulating hormone and luteinizing hormone from the anterior pituitary.