Config files are specific to your phone model and the GCam version you are using.
: One of the most advanced builds, featuring unique .gca files for easier setup. gcam config 81 2021
gcam-help@pnl.gov – describe your need for "config 81" from a 2021 paper. Config files are specific to your phone model
GCam’s HDR+ is sensitive to light smearing caused by fingerprints. gcam config 81 2021