Man pages matching name globus_gsi_callback_activation in section 3:

globus_gsi_callback_activation.3.en	debian 10 / libglobus-gsi-callback-doc
globus_gsi_callback_activation.3.en	debian 11 / libglobus-gsi-callback-doc
globus_gsi_callback_activation.3.en	debian 12 / libglobus-gsi-callback-doc