[Armin]

You can reassign a skill to be based on WIS just by using Add Tag in Advanced Edit to add tag stat and the name of your attribute, WIS in this example. That will tell GCA to base this particular skill on that attribute but otherwise use the progression given.

So, if you take Acting, an IQ/A skill, and use Add Tag to change stat to WIS then it would be treated as an IQ/A skill but use WIS instead of IQ.

That's the ad-hoc way.

For a more comprehensive method, you'd have to create and edit a book file to create a new skill type, such as WIS/E through WIS/VH. Then you'd have to include all the skills (or just commands to change existing skills) to the new types, such as WIS/A for Acting.

That allows you to implement your changes for any new characters for the campaigns using a library where that specific book is included.