Geriatricians Loan Forgiveness Act of 2007- Amends the Public Health Service Act to include each year of fellowship training in geriatric medicine or geriatric psychiatry required in order to obtain a certificate of added qualification in those fields as a year of obligated service under the National Health Service Corps Loan Repayment Program. Requires an individual to provide services in geriatric medicine or geriatric psychiatry during the period of obligated service upon completion of training.