In doing so, parts of municipalities from Munich, Puchheim, Olching, and Geiselbullach were merged into one location around the Gröbenzell train station.

[4] Gröbenzell is located at the creek Gröbenbach at the margin of the Dachauer Moos, an area that once was predominantly marshy.

[5] To the south Gröbenzell seamlessly borders Puchheim, to the north-west lies Olching and to the east the Munich district Lochhausen is located.

It refers to a toll ("Zoll") station that was built next to the creek Gröbenbach to supervise the construction of a street between Lochhausen and Olching.

In 1952 the town Gröbenzell was officially founded by merging several districts of Munich, Puchheim, Olching and Geiselbullach to one community.

In the eastern part of the municipality, between the railway line and the state road to Lochhausen, the Gröbenzell industrial estate was established.

In addition to the usual supermarkets and discount stores, various crafts and small industrial enterprises can be found there.

Until the early 1970s, both parts of the municipality were connected for general traffic via a level crossing extension of Kirchenstraße to Bahnhofstraße.

Subsequently, Kirchenstraße was converted into a one-way street along its entire length, and the southern part of Bahnhofstraße became a dead-end, both only applicable to motor vehicle traffic.