General Graardor is within God Wars Dungeon, and it is recommended to at least have Trollheim Teleport (Lunar) unlocked. You can also use God wars teleport or a Max Guild boss portal tuned to General Graardor. From Trollheim, climb down the cliffsides go north past the thrower trolls, past the large rock, and down the entrance into the dungeon near the wolves. Once there, run northwest and open the door into Bandos' Stronghold - this requires 70 Strength, which is not boostable.