Yes, there's a disagreement among scholars about the location of Gur-Baal.
The Encyclopedia Mikrait (Hebrew Biblical Encyclopedia), entry 'גור בעל' writes that Gur-Baal was in southern Judah, in the Negev area. This was likewise asserted by Nadav Na'aman here, p. 267, n. 17 and Martin Selman also seemed to go in this direction. Their argument is mostly based on the assumption that since the Arabs are mentioned together with the Plishtim, that means that they lived nearby. The Negev is near Philistia.
The LXX added that this place was near Petra (κατοικοῦντας ἐπὶ τῆς πέτρας), hence the identification with Bozrah, which is near Petra. This was accepted by several of the commentaries found online, as well as several scholars such as Yehoshua M. Grintz here, p. 138 and Alois Musil here. It should be noted that an Idumean (late Edomite) ostracon features the name Gurbaal (גורבעל) as well as one that features the name Baalgur (בעלגור).