Bandos is one of the four godwars dungeons that are available. The boss in this dungeon is General Graardor, and he is the leader of the Bandos Army. He is one of the last surviving members of the Ourg race, and awaits you to challenge him inside of the Bandos' Stronghold within the God Wars Dungeon.
Inventory
x 21 Sharks
x 3 Super Restore (4)
x 1 Super Strength (4)
x1 Super Attack (4)
x 2 Saradomin Brew (4)
Gear
This is an example of an ideal inventory that you can take to Bandos. Remember to bring a ring of Wealth!
Then all you have to do is go to your spellbook tab and navigate:
Bosses > Godwars > Bandos
Enter, pray melee, and good luck!
--Credit to Pernix Beast for photo #1