The website is still under development and the disks are still being catalogued. However, you can find all the disks listed in the below PDF documents. Search for: listing
https://gem-club.com/repository-downloads-search/ A good listing can be found https://gem-club.com/download/gemclub-full-disk-listing-97-pdf/
Once you find a disk, for example UD100, UX042, you will need to go the members search and enter the required disk number(s).
Tip: You can also enter a category of disk such as UX, to see a broader range