Yes, this is gluten free
All gluten-free. These are either synthesised or produced by fermentation, and the distinction that settles it is that gluten is a protein and none of these is. Even where a fermentation is fed on a grain-derived sugar, what is purified out at the end is the acid, not the protein. Citric acid is the one people ask about most, and it is fine.
sodium phosphate is covered by CiCi's entry on acids and preservatives, which share this answer and the reasoning behind it.
Every one of these is the same ingredient. The number of names is a large part of why gluten slips past people who read every label.
Point CiCi at the barcode on the product you're holding and get this same reasoning in about two seconds, plus the carbs and the full nutrition panel. 360,000+ packaged foods are already read and waiting.
This answer comes from CiCi's ingredient lexicon — the same rules the scanner uses, not a separate article. Where reputable sources disagree, CiCi takes the conservative position and says so.