Gabriele "Gabi" Zimmer (born 7 May 1955) is a German politician who served as leader of the Party of Democratic Socialism (PDS) from 2000 to 2003.

After graduating from high school, she studied Russian and French in the Theoretical and Applied Linguistics section of the Karl Marx University in Leipzig from 1973 to 1977, graduating as a qualified linguist.

Then she worked as a clerk at VEB vehicle and hunting weapons factory "Ernst Thälmann" in Suhl.

She was a member of the Landtag of Thuringia from 1990 until 2004. Zimmer became federal deputy leader of PDS in 1996.

The party suffered a major defeat in the 2002 federal election, failing to pass the 5% electoral threshold and returning only two representatives.