There is no "Volume 1" that lists everything. The Catalogue Général is a fragmented library of niche monographs. Furthermore, no official entity has ever consolidated these 90+ French-language tomes into a single, searchable PDF due to copyright complexities (some volumes have been reprinted) and the sheer scale of optical scanning required.
A true official catalogue includes:
If you are looking for more concise or thematic guides, the following are also available: The Illustrated Guide to the Egyptian Museum in Cairo : A 314-page guide by Samy Salah. General Museum Guide (1915) The Egyptian Museum Cairo Official Catalogue Pdf Download