How long did Glenn Richardson serve as Speaker of the Georgia House?

Glenn Richardson served as Speaker of the Georgia House from 2005 to 2010, making this the correct choice. His tenure as Speaker is noted for significant leadership within the Republican majority during that period. Richardson's leadership involved various legislative initiatives and policy reforms that shaped the House's direction at the time.

The other time frames mentioned do not align with his actual period of service. For instance, while Richardson was involved in the House prior to 2005 and had notable contributions, it was specifically during the years of 2005 to 2010 that he held the title of Speaker. This context highlights the importance of understanding specific political timelines in order to accurately identify significant roles and their respective durations within state government.