A Group Medical Cover, or GMC, is a type of health insurance that is offered to a group of people, such as the employees of the same organization. Their dependents, including spouse, children, and parents, can also be covered under this. Generally, such a policy is offered as a benefit by an employer, who bears the cost of the premium. As the risk of this kind of health insurance is spread across a pool of insured individuals, the premiums are kept low.