Dark Binding, Inner Fire, Inner Will, PoM, and Weakened Soul are the 5 glyphs I rotate around when soloing. For a boss like Gurtogg, I would probably suggest Inner Fire, Dark Binding and Weakened Soul. There's also the matter of consumables that you can use such as Potions, Flasks, food and drums if you have the money to spare. I also suggest you get those PvP gear if it will boost your item level up by around 20-30. Also just for your information, the boss you mentioned has actually been soloed in cataclysm, and there are some videos for it so watching them may also prove to be useful to you.