Q1 for fiscal year 2009 could very well be November, which is in time for the holidays.
On a related note: Take Two also released shipment numbers and sales estimates for GTA in their financial results:
Rockstar Games released the highly anticipated Grand Theft Auto IV on April 29, 2008. The title surpassed all-time entertainment records for day one and week one sales, with approximately 6 million units sold through globally in the first week at an estimated retail value of more than $500 million. As of May 31, 2008, over 11 million units have been sold in to retailers and approximately 8.5 million units have been sold through to consumers.