LogInputTo( filename )
LogInputTo causes the subsequent input lines to be logged to the file
with the name filename, i.e., every line you type will also appear in
this file. This file must of course be writable by GAP, otherwise an
error is signalled. Note that LogInputTo will overwrite the previous
contents of this file if it already existed.
LogInputTo()
In this form LogInputTo stops logging again.
GAP 3.4.4