tried another way to check for gnu userland

.zshrc

@@ -1,5 +1,12 @@
-gnuloc=$(command -v gcc)
-if [ "${gnuloc}" = "/usr/bin/gcc" ]; then
+grep --help >/dev/null 2>&1
+RESULT=$?
+IsGNU=null
+if [ $RESULT -eq 0 ]; then
+  $IsGNU = true
+else
+  $IsGNU = false
+fi
+if [ "${IsGNU}}" = "true" ]; then
 #source ~/.bash_profile
 # If you come from bash you might have to change your $PATH.
 # export PATH=$HOME/bin:$HOME/.local/bin:/usr/local/bin:$PATH