This works for the nuna pipa car seat to fit the city mini gt single. Works great!
It does, indeed, work with the older Citi Mini GT. I couldn't find anywhere else to get this, and their customer service is outstanding.
So grateful for the strolleria blog that showed me which stroller I could get to match the Nuna pipa. This made it super easy! https://strolleria.com/collections/strollers-compatible-with-nuna-pipa
It was hard to find an adapter to work with our new car seat and older city mini and we were thankful to find this site! This even worked with our 2012 model of the stroller and was so easy to put in and fits great with our nuna pipa lite. Shipping was really quick too.