We have finally investigated and resolved the issue of Gboard causing bootloop in Gapps builds and to the conclusion we have re-included Gboard in Gapps builds overriding AOSP Keyboard..

So every build dated 07/04/2025 or after this will include Gboard instead of AOSP keyboard in gapps builds

As we know dirty flashing from aosp keyboard build to google keyboard build is a bit problematic and requires clean flash or there will be "no keyboard" issue..

Here are workarounds to make it work with a dirty flash:-

Flash/Sideload this zip in recovery before flashing the new build
If in case you still find no keyboard or a crashing keyboard after dirty flashing the new build just Flash/Sideload this zip in recovery again and it will be resolved

This above method would save you from "no keyboard" issue which may occur if you don't clean flash the new build containing Gboard..

Even the current v2.6 Gapps build users can flash this zip in recovery to get Google keyboard overriding the AOSP keyboard.