After the war, Gorbach joined the newly established Austrian People's Party, and upon the 1945 legislative election became third president of the National Council parliament, an office he held until 1953 and again from 1956 to 1961.[2] When a deceiving outcome in the 1959 election launched an internal party debate over aging ÖVP Chancellor Julius Raab, Gorbach, backed by the Styrian regional association, succeeded him as party chairman and on 11 April 1961 also as Austrian chancellor.
Chancellor Gorbach led his party into the 1962 election with an anti-Socialist campaign, only to continue the grand coalition with the SPÖ under Vice-Chancellor Bruno Pittermann afterwards. The People's Party achieved a slightly better result and became the strongest party five seats ahead of the Socialists, however, it failed to reach an absolute majority. After three years as chancellor, conciliatory Gorbach had to vacate his position in favour of the less pragmatic ÖVP "reformers" around his successor Josef Klaus. He returned to the National Council where he kept his mandate until 1970. In 1965 he unsuccessfully ran against Franz Jonas in the Austrian presidential election.
Gorbach remained honorary chairman of the Austrian People's Party. He died in Graz, Styria, aged 73.
