https://www.st.com/content/ccc/resource/technical/layouts_and_diagrams/board_manufacturing_specification/5f/c6/1f/c6/74/a7/49/09/PLUG-CR95HF-B%20_gerber.zip/files/PLUG-CR95HF-B%20_gerber.zip/jcr:content/translations/en.PLUG-CR95HF-B%20_gerber.zip
скачай и загрузи вот сюда https://www.pcbway.com/project/OnlineGerberViewer.html