ASUS boardview in .cad format, 2.84 MB, with a truncated DOS-style short name that only hints at a model starting with GX, so the exact model cannot be determined from it. Open the file in a boardview viewer such as OpenBoardView or FlexBoardView and compare the board number it shows with the one printed on your PCB. Once matched, it helps locate components, measure resistance to ground on rails, and find test points while chasing a no-power or short fault.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @Boardviewno. Enginerys does not host this file.
How to open a .cad file
GenCAD text export, the usual format for Compal, Quanta, Wistron and Dell / HP / Lenovo laptop boards.