For the
1960 Rome Olympics a Victorian
coxless four was selected as the 7th and last priority boat and wholly on the basis of self-funding. Gillon was picked in the three seat of that crew with the others coming from various Melbourne clubs -
Peter Guest,
Brian Vear and
Kim Jelbart. The lack of coaching support provided to the team by the Australian Olympic Federation proved to be an issue. The four was eliminated at the repechage stage and there was no B final. For the
1964 Tokyo Olympics, the Australian 1964 national champion Mercantile coxless four was selected in-toto as Australia's coxless four entrants with Gillon at stroke. They placed 4th in their heat and 4th in the repechage, to be eliminated at that point, missing the B final and an overall regatta placing. ==Professional career==