[1][2][3] Her great-grandfather was a Republican Left of Catalonia mayor of Sarrià de Ter in the 1930s and was later imprisoned by the fascist Franco dictatorship.

[1] Geis and her sister Cristina grew up in the Pont Major neighbourhood of Girona where their parents Martí and Quimeta had a metal workshop.

[2][4] In 2011 the UdG awarded her an extraordinary prize for her 2008 law doctorate thesis "La Ejecución de las Sentencias Urbanísticas" (The Execution of Urban Judgments).

[3] However, following the 2017 Catalan independence referendum (1-O), she decided to temporarily suspend her academic career and enter politics.

[9][10] Considered a Puigdemont ally, she was heavily involved in JuntsxCat and the National Call for the Republic.