I want to reinforce these items adding them to HouHou srs
I know two ways of doing this.
The first one is the Item Inspector script. It displays items in a table. You will have to add a table configured with the SRS level filter to make it do what you want.
The other method is to use https://www.wkstats.com/v2/progress/dashboard. You go under Item then Wanikani and you can configure the report to sort items by SRS stages.
Both methods will work equally well, so it is up to you.
There is also a self study script that I believe should allow you to select to review only your guru items. Someone can correct me if I’m wrong on that. I know the self study script on Flaming Durtles works that way, at least.