As you are using a Gutenberg original, you might like the following.
http://www.waldenfont.com/
In the lower left corner is a link labelled Fraktur. It leads to a collection of fonts, most of which are Fraktur style. There is a (non-Fraktur) font based on Gutenberg’s font.
http://www.waldenfont.com/product.asp?productID=2
If one then returns to the http://www.waldenfont.com/ page and then clicks on the word Downloads on the on-page Menu Bar, one arrives at the following page.
http://www.waldenfont.com/content.asp?contentpageID=9
There are three items related to The Gutenberg Press, a brochure, a manual and a sample font with some characters missing. The mappings for the ligatures and special characters are 8-bit.
However, if you want some Unicode Private Use Area mappings for the ligatures and special characters, I did produce some in 2002.
http://www.users.globalnet.co.uk/~ngo/golden.htm
For the avoidance of doubt, however, I mention that the golden ligatures mappings have no official status, you are free to choose whatever Private Use Area mappings you wish for ligatures in your font.
MUFI was produced later than golden ligatures, yet is much more popular. Where both map a ligature, for example, ct, I advise that you use the MUFI mapping, though you are free to include both if you wish, though including both could perhaps lead to confusion for some users of your font so perhaps better not to do so. However, golden ligatures does not cover as many special characters as MUFI, yet the last time I checked, some time ago, MUFI did not have mappings for ligatures such as ppe.
One of my fonts, Chronicle Text, is a blackletter font and includes glyphs for many ligatures.
http://forum.high-logic.com:9080/t/chronicle-text-font/668/1
In particular, the following document.
http://www.users.globalnet.co.uk/~ngo/typecase_Chronicle_Text_golden_ligatures.pdf
As you may already know, using Private Use Area mappings for ligatures is not the preferred way of including ligatures in a font. The preferred method is to produce an OpenType font with one or more glyph substitution tables. However, using Private Use Area mappings for ligatures can be a good way of getting good hardcopy printouts and producing graphics for the web using software that does not have facilities for handling glyph substitution from an OpenType font.
I hope that this helps.
William Overington
28 December 2010