Despite the fact that Julius Gast and also Henry (Hans) Goudsmit appear at the "Erelijst Verzet en Koopvaardij", there is no indication found that Julius and also Hans were active in the resistance. See for that chapter 2, http://onderzoekfeuilleton.blogspot.nl/2017/07/op-zoek-naar-hans-goudsmit-2-lotgenoten.html which is based on forms, received from NIOD, on which family members have them signed up for the "Erelijst".
Posted by the editors of Joods Monument, based on information supplied by John Löwenhardt.