Kammala jumla mai zuwa: A shekara ta 2007, Gamm ta kai lokacin da ta samu nasara a cikin nutsewa, lokacin da ita da abokin aikinta Subschinski suka sami lambar tagulla don wannan horo a Gasar Cin Kofin Duniya ta FINA a Melbourne, Ostiraliya, inda suka tara maki 306.63. A cikin
Gamm ta lashe lambar zinare ta huɗu a jere (wanda aka fara yi a 2002), tare da abokin aikinta Subschinski, a cikin dandamalin da aka daidaita na mata, tare da jimillar maki 336.63.