Read FreeSurfer GCA file.
Author
This function is based on Matlab code by Bruce Fischl, published under the FreeSurfer Open Source License available at https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferSoftwareLicense. The R version was written by Tim Schaefer.
Examples
if (FALSE) { # \dontrun{
gca_file <- file.path(Sys.getenv("FREESURFER_HOME"), "average", "face.gca")
gca <- read.fs.gca(gca_file)
} # }