Catalyzes the oxidation of hydrogen sulfide, with the help of a quinone. 2 H(+) + hydrogen sulfide + sulfite + ubiquinone-10 = thiosulfate + ubiquinol-10 a quinone + glutathione + H(+) + hydrogen sulfide = a quinol + S-sulfanylglutathione Binds 1 FAD per subunit. Belongs to the SQRD family.