+@item gnus-gcc-self-resent-messages
+@vindex gnus-gcc-self-resent-messages
+Like the @code{gcc-self} group parameter, applied only for unmodified
+messages that @code{gnus-summary-resend-message} (@pxref{Summary Mail
+Commands}) resends. Non-@code{nil} value of this variable takes
+precedence over any existing @code{Gcc} header.
+
+If this is @code{none}, no @code{Gcc} copy will be made. If this is
+@code{t}, messages resent will be @code{Gcc} copied to the current
+group. If this is a string, it specifies a group to which resent
+messages will be @code{Gcc} copied. If this is @code{nil}, @code{Gcc}
+will be done according to existing @code{Gcc} header(s), if any. If
+this is @code{no-gcc-self}, that is the default, resent messages will be
+@code{Gcc} copied to groups that existing @code{Gcc} header specifies,
+except for the current group.
+