Geometric and Functional Analysis (GAFA) is a mathematical journal published by Birkhäuser, an independent division of Springer-Verlag.

The journal publishes major results on a broad range of mathematical topics related to geometry and analysis.

The idea for the journal was inspired by the long-running Israeli seminar series "Geometric Aspects of Functional Analysis" of which Vitali Milman had been one of the main organizers in the previous years.

The journal retained the same acronym as the series to stress the connection between the two.

[3] The journal has seven editors: Vitali Milman (editor-in-chief), Simon Donaldson, Mikhail Gromov, Larry Guth, Boáz Klartag, Leonid Polterovich, and Peter Sarnak.