In 2015, Bavaria's Minister President Horst Seehofer nominated him as one of his deputies in the office of CSU chairman, making him part of the party's leadership.
In the negotiations to form a coalition government under the leadership of Chancellor Angela Merkel following the 2017 federal elections, Gribl co-chaired the working group on urban development; his counterparts were Bernd Althusmann and Natascha Kohnen.
In March 2019, Gribl announced that he would not stand in the 2020 local elections but instead resign from active politics by the end of his term.
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