Glad you brought this up, Kayley! It’s an important and fascinating topic. The Internet Archive is doing a pretty good job with web pages that include webfonts. See, for example, a 2013 version of barackobama.com, and the now defunct FontBureau.com. Once in while, however, the fonts (and subsequently the page designs) are lost when the files are served by an external source rather than the same domain as the given website. We've been discussing this challenge at Letterform Archive, which exists to preserve letterforms of all kinds. We’ve partnered with Internet Archive on other projects, so I hope we can put our heads together on this one.
Meanwhile, projects like Fonts In Use – where we publish screenshots of websites and other media that use digital fonts, as well as biographical entries for each typeface family – can serve as a partial record. But this doesn’t replace the need for a comprehensive archive which captures the dynamic nature of digital type. With the advent of Variable Fonts, the only way to have a complete archive is to store the files themselves.
Small correction: Gill Facia is a typeface designed by Colin Banks in 1996. It’s based on a lettering model designed by Eric Gill for WH Smith around 1905, which was never really a font, but a set of drawn templates for sign painters.
Peško’s font is another interpretation of that lettering, which is fine. I just don’t see why he wouldn't mention Gill by name as a source.