Mostly yes. If `tar` resolves to gtar in your PATH, your archives won't carry the LIBARCHIVE.* xattrs that GNU tar can't decode, so the warnings go away.
One thing that still trips me up though: `._Foo.txt` AppleDouble files get created in your filesystem any time something Finder-adjacent touches a folder, and gtar archives them just fine, but they show up as garbage on the Linux side. `dot_clean -m mydir/` before tarring kills them, or you can pipe through `--exclude='._*'` if you don't want to touch the source tree.
One thing that still trips me up though: `._Foo.txt` AppleDouble files get created in your filesystem any time something Finder-adjacent touches a folder, and gtar archives them just fine, but they show up as garbage on the Linux side. `dot_clean -m mydir/` before tarring kills them, or you can pipe through `--exclude='._*'` if you don't want to touch the source tree.