We characterize generalized almost paracontact pseudometric structures after a conformal change and investigate invariant components of these structures under conformal changes. Then we characterize the conformal changes of normal generalized paracontact pseudometric structures, generalized almost para-co-K{\"a}hler structures, and generalized para-co-K{\"a}hler structures. We also give examples of a generalized almost para-co-K{\"a}hler structure and a normal generalized paracontact pseudometric structure that remains invariant under a nonhomothety conformal change.