http://gurpsland.no-ip.org/GCA4/HalfStatDefaults.zip
Preliminary file, this includes only skills in the Basic Set data file, and even then does not address spells. It needs to be checked for accuracy, as this was a mass conversion and very few skills have been looked at specifically for errors.
All skill types have been altered to include the default modifier as computed in the article. This is both convenient for referencing and necessary for technical reasons.