Man pages matching name gnutls_pk_bits_to_sec_param in section 3:

gnutls_pk_bits_to_sec_param.3.en	debian 10 / gnutls-doc
gnutls_pk_bits_to_sec_param.3.en	debian 11 / gnutls-doc
gnutls_pk_bits_to_sec_param.3.en	debian 12 / gnutls-doc