WIKI that is ISO27001 compliant

I'm not sure if I understood your question correctly - are you looking to improve your existing Wiki solution, or are you looking for a new document management system?

In any case, you have to set the rules for your document management system, and these articles will help you do that:
- Document management in ISO 27001 & BS 25999-2 https://advisera.com/27001academy/blog/2010/03/30/document-management-within-iso-27001-bs-25999-2/
- Information classification according to ISO 27001 https://advisera.com/27001academy/blog/2014/05/12/information-classification-according-to-iso-27001/

If you are looking for a template of the procedures for document management, you'll find them here:
- Procedure for Document Control https://advisera.com/27001academy/documentation/procedure-for-document-and-record-control/
- Classification Policy: https://advisera.com/27001academy/documentation/information-classification-policy/

If you are looking for a platform for document management, you can use our Conformio: https://advisera.com/conformio/ and this article will explain you how to use it: Wh at kind of Document Management System (DMS) do you need for handling ISO documents? https://advisera.com/conformio/blog/2020/08/11/what-kind-of-dms-you-need-for-handling-iso-27001-documents/