Gasteyger participated in the Volcker Commission, established to investigate the many dormant accounts opened by Jews fleeing Nazi persecution in Swiss Banks.
In 2003, he was awarded the Great Cross of Merit of the Federal Republic of Germany (Bundesverdienstkreuz).
In 2005, the HEI created the Gasteyger Chair in International Security and Conflict Studies in Gasteyger's honour, after a large donation from APESI. The first professor to hold the chair was Thomas J. Biersteker.