feat(gnu-utils): include ggrep in gcmds (#10044)

Co-authored-by: NRobert Lankford <robert.lankford@nuorder.com>

plugins/gnu-utils/gnu-utils.plugin.zsh

@@ -36,7 +36,7 @@ __gnu_utils() {
   gcmds+=('gfind' 'gxargs' 'glocate')
 
   # Not part of either coreutils or findutils, installed separately.
-  gcmds+=('gsed' 'gtar' 'gtime' 'gmake')
+  gcmds+=('gsed' 'gtar' 'gtime' 'gmake' 'ggrep')
 
   for gcmd in "${gcmds[@]}"; do
     # Do nothing if the command isn't found