G. browni lived about 5 million years ago in the Sivalik Hills of Pakistan.

G. browni can be distinguished from G. gangeticus by its more closely spaced eyes and a narrower frontal bone.

[2] The species was named in 1932 by paleontologist Charles Mook.

Mook described it as a transitional form between the most primitive Gavialis species, Gavialis dixoni, and the most advanced, the modern gharial (although G. dixoni is now placed outside Gavialis in its own genus, Dollosuchus, and may be more closely related to crocodiles than to the gharial).

[5] Below is a cladogram that shows the proposed phylogeny within Gavialidae, including extinct members:[6] Gavialis gangeticus Gharial Gavialis bengawanicus† Gavialis browni† Gryposuchus colombianus† Ikanogavialis† Gryposuchus pachakamue† Piscogavialis† Harpacochampsa† Toyotamaphimeia† Penghusuchus† Gavialosuchus† Tomistoma lusitanicum† Tomistoma schlegelii False gharial This article about a prehistoric archosaur is a stub.