General Aviation Small Business Relief Act of 2003

General Aviation Small Business Relief Act of 2003 - Amends the Small Business Act to direct the Small Business Administration to make grants to general aviation small business concerns in amounts equal to direct losses sustained since September 11, 2001, as a result of any Federal ground stop order(s) related to the terrorist attacks. Authorizes loans to assist such a business that has suffered, as a result of such attacks, substantial economic injury that is not incidental to the business's revenue and that is not compensated for by insurance or otherwise.

Extends the due date for excise tax deposits for general aviation small business concerns.