Exhibit 99.1 GMS Reports Fourth Quarter and Fiscal Year 2024 Results Volume Growth Across All Four Major Product Categories Drove Record Levels of Full Year Net Sales and Strong Cash Flow Tucker, Georgia, June 20, 2024. GMS Inc. (NYSE: GMS), a leading North American specialty building products distributor, today reported financial results for the fourth quarter and fiscal year ended April 30, 2024. Fourth Quarter Fiscal 2024 Highlights (Comparisons are to the fourth quarter of fiscal 2023 unless otherwise n ...