This research examines how controlling corruption impacts government effectiveness in GCC countries while also considering independent variables like political stability, industry, gross national expenditure, regulatory quality, and rule of law. The study uses panel data from 2003 to 2022 for six emerging GCC countries: Saudi Arabia, the United Arab Emirates, Kuwait, Qatar, Bahrain, and Oman. Data for this analysis was sourced from the World Bank database, 2023. The study applied the ordinary least squares (OLS) method and accounted for the effects of COVID-19 and the 2008 recession on government effectiveness. Diagnostic tests for autocorrelation, multicollinearity, heteroscedasticity, and normality were conducted to ensure the reliability of the regression results, revealing no issues with multicollinearity or normality. The findings show that control of corruption and other variables significantly affect government effectiveness in GCC countries, with an adjusted R² of 87.4%. The model proposed could be recommended as a tool for assessing government effectiveness in any country.