I find no mention of Gabriel Player, goldsmith of London (active 1700-1713) on the website. My references are i)English Goldsmiths and Their Marks_"Gabl. Player, 1700, ii) Petitioner in 1703 (Calendar of Treasury Books), and iii) Silver dish by Gabriel Player (Sotheby's Olympia 2007) hallmarked for 1713.
Reading the Will of Gabriel Player, Gentleman of West Malling, Kent (proved 1744) , I see that he left property in Sharp's Alley, Cow Cross St. Sepulchres (London/Middlesex) to his wife Jane, and other properties in St. Sepulchres to his daughter Mary Clarke, the wife of John Clarke. Gabriel's previous occupation is unfortunately not stated, but I would appreciate any further information to establish a link (or otherwise) with the London goldsmith.