Support for Dynamics GP 9.0 ended yesterday, i.e., 11-January-2011. The support Lifecycle for Dynamics GP 9.0 can be found here. In order to avail support from Microsoft, It is required to upgrade to Dynamics GP 10.0 or higher.
Mainstream support for Dynamics GP 10.0 ends on 09-October-2012.
Important Note on Payroll Round 2 Update for Dynamics GP 9.
Though support for Dynamics GP 9.0 ends on 11-Jan-2011, Microsoft will release the Round 2 Tax update for Dynamics GP 9.0 also as was unofficially told in Microsoft Dynamics Partner Forum discussion thread. The discussion can be found here. The word is also that Microsoft will provide Dynamics GP 9.0 support for the installation of this patch file alone. It applies the same for SBF 9.0.
Disclaimer: Please note that the above is provided for informative purposes. Please contact Microsoft support Team or your authorized Microsoft Partner for any queries.