Quicklabs

Various free Quicklabs posted by Satish V;
https://github.com/sathishvj/awesome-gcp-certifications
https://medium.com/@sathishvj/qwiklabs-free-codes-gcp-and-aws-e40f3855ffdb

Free Quicklabs for GCP;

https://google.qwiklabs.com/catalog?format%5B%5D=any&level%5B%5D=any&duration%5B%5D=any&price%5B%5D=free&modality%5B%5D=any&language%5B%5D=any&per_page=50|Free Google Quicklabs

Data Specific GCP Quicklabs;
https://google.qwiklabs.com/catalog?keywords=data&format%5B%5D=any&level%5B%5D=any&duration%5B%5D=any&price%5B%5D=free&modality%5B%5D=any&language%5B%5D=any|GCP Data Quicklabs