gstring.RdParses and evaluates a GString into a regular string.
# S3 method for default
gstring(..., file=NULL, path=NULL, envir=parent.frame())character strings.
Alternatively, a file, a URL or a connection from
with the strings are read.
If a file, the path is prepended to the file, iff given.
The environment in which the GString is evaluated.
Returns a character string.
gcat().