Gun font here refers to the font used in the cover artwork of Gun, which is a Revisionist Western-themed video game released in 2005.
The font used for the game title in the cover is probably Friz Quadrata Bod, a display font originally designed in a single weight by Swiss designer Ernst Friz for VGC in 1978 and the bold weight was produced by VGC and ITC later. More details about it can be found here.
Download Friz Quadrata Font
The Friz Quadrata font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.