Global Investment in American Jobs Act of 2020 This bill requires the Department of Commerce to conduct an interagency review of the global competitiveness of the United States in attracting foreign direct investment and addressing foreign trade barriers that firms in advanced technology sectors face in the global digital economy. Such review shall include an assessment of (1) the current economic impact of foreign direct investment in the United States, (2) trends in global cross-border investment and data flows, (3) federal government policies that are linked to the ability of the United States to attract and retain foreign direct investment, and (4) the adequacy of federal government efforts to increase the ease for foreign firms considering investment in the United States. Commerce must report the findings of such review and submit recommendations for increasing the global competitiveness of the United States in attracting foreign direct investment and developing new technologies and services.