Updated version of the IRIS Guide for applicants

An updated version of the IRIS guide for applicants (how to submit) v1.8 (europa.eu) has been published in the IRIS portal (Guidance section). 

Thank you for the information.
I believe we are talking about v2.4 (not 1.8?) document dated 20 October 2021 ?
There is a section 7.2 added for GCP inspections. Does it mean feature for GCP inspections has been launched ? (or is this only a pre-info as already communicated in trainings?)
 

Yes, unfortunately the link name retains the old version's number, the updated version number (2.4) is showing in the document. 
GCP is not released yet, due to unforeseen problems raised in UAT (User Acceptance Testing), which need some refactoring of the development; the guidance document is, as you say, pre-info,