After the war, Gille opened a book store and became active in HIAG, a lobby group and a revisionist veteran's organisation founded by former high-ranking Waffen-SS personnel in West Germany in 1951.

In January 1945 Gille, as leader of the IV SS Panzer Corps, participated in a failed attempt to relieve the encircled German and Hungarian troops in the Battle of Budapest.

In the early 1950s, Gille became active in HIAG, a lobby group and a revisionist veteran's organisation founded by former high-ranking Waffen-SS personnel in West Germany to campaign for their legal, economic and historical rehabilitation.

It began respectably, with Gille announcing that the veterans were ready to 'do their duty for the Fatherland' and Steiner declaring support for 'freedom, order and justice'.

Former paratroop general Hermann-Bernhard Ramcke, who had been invited to demonstrate so-called solidarity with the Wehrmacht, condemned the Western Allies as the 'real war criminals' and insisted that the blacklist on which all former SS members then stood would soon become "a list of honor".

Periodicals as far as the U.S. and Canada carried headlines Hitler's Guard Cheers Ex-chief and Rabble-Rousing General Is Worrying the Allies, with the latter article reporting that Ramcke's speech had been greeted with "roars of approval and cries 'Eisenhower, Schweinehund!'