The GMO Resources Fund Class I (GEACX) is a mutual fund that focuses on investing in companies within the natural resources sector. This includes industries such as energy, mining, agriculture, and forestry. The fund aims to provide long-term capital appreciation by investing in companies with strong fundamentals and potential for growth in the natural resources industry. As a Class I fund, it is typically only available to institutional investors and has a lower expense ratio compared to other classes of the same fund.