This is the 11139th most frequent Polish word.
gliwicką
"Gliwicką" is the accusative or instrumental form of the adjective meaning "related to Gliwice," a city in Poland.
Used here as an adjective to describe a specific library located in Gliwice.
Wczoraj odwiedziliśmy gliwicką bibliotekę.
Yesterday we visited the Gliwice library.
Describes the river associated with Gliwice, using a possessive/adjectival form.
Na mapie znaleźliśmy gliwicką rzekę.
On the map, we found the Gliwice river.
Here, it specifies the street as being located in Gliwice.