Karel Tavernier released revision 2018.11 of the Gerber Format Specification. The document is available on the Gerber Download page.
Ucamco Releases version 2.8 of the Reference Gerber Viewer
Ucamco, caretaker of the Gerber Format, released version 2.8 of its online Reference Gerber Viewer. The viewer now displays all the meta-information contained in Gerber X2 files: layer structure, via pads, CAD netlist, component reference descriptor and pad pin numbers.
The URL of the Reference Gerber Viewer is https://gerber.ucamco.com