 During his time at Bayern, Gerster won a League title and a Cup and also represented Germany, being named in the squad for the 1995 FIFA World Youth Championship in Qatar, and making fourteen appearances for the Germany under-21 team.In 1998, Gerster left Bayern to sign for Eintracht Frankfurt, where he had a hugely unsuccessful three years, making only one first-team appearance, in a 4–1 defeat to 1860 Munich.After leaving Frankfurt, Gerster embarked on a journeyman career, playing for various Regionalliga clubs before retiring in 2009 after a year with Chemnitzer FC.