Our Encryption at rest is using Google Cloud Platform’s (GCP) encryption at rest by default.
The AES 256 algorithm is being used and the encryption key is managed by GitLab and deployed through GCP Key management system. Also this key is set for auto rotation.
All data within GCP is encrypted in transit by default, utilizing TLS 1.2.
If you have any more specific questions we would be happy to help track down some answers