is there an EQ ensemble with auto gain function similar to fabfilter Q3 auto gain?
There are plenty of EQ in the User Library, some of them are really great.
Download whatever you want and check until you find what you need :-)
https://www.native-instruments.com/en/reaktor-community/reaktor-user-library/all/all/all/all/eq%20auto%20gain/latest/1/all/?q=eq%20auto%20gain&t=userlib
@Milos you are in the Reaktor forum, where users asks for Reaktor, not Guitar Rig, so... stay on Reaktor please! And if you give answers such as "no", first make sure that you know what are you talking about... :-)
No, but you can use Guitar Rig 7 Player as an alternative.
Put the GR inside the in-DAW Fx rack.
Problem solved.