Roland provides free downloadable patches and a patch management application for the Roland GR-55.
Artist and collection patches
Download additional patches for the GR-55, including artist signature patches and genre-based collections:
https://www.rolandus.com/go/gr-55_artist_patches/
GR-55 Librarian (patch management software)
GR-55 Librarian lets you transfer patches to and from the GR-55 and back up your patches on a computer. Download the Windows or Mac version here:
https://www.roland.com/global/products/gr-55/downloads/
After installing GR-55 Librarian, open its Help menu for a PDF guide covering how to connect the GR-55 and load patches.