Man pages matching name globus_gsi_credential.h in section 3:

globus_gsi_credential.h.3.en	debian 10 / libglobus-gsi-credential-doc
globus_gsi_credential.h.3.en	debian 11 / libglobus-gsi-credential-doc
globus_gsi_credential.h.3.en	debian 12 / libglobus-gsi-credential-doc