PGT-Alamos was formed as a regroupment of the few elements in the Alamos region of the erstwhile Guatemalan Party of Labour - Communist Party (PGT-PC) that survived the 1983 purges against the organisation.
PGT-Alamos was reconstituted from the remaining components in the Alamos area of the former Guatemalan Labour Party-Communist Party (PGT-PC) that endured the 1983 purges against the organization.