Lead-taming with peace
I plain-ol' peace-tame them. 120 peace/120 music with jewels.
I like to do this in the clearing south of the Daemon Temple on the Isle of Fire, but I've done it in Destard as well (preferably away from spawn).
I have an area-peace macro set (ie. use peace skill on yourself).
Find a dragon and area-peace near it. Walk up to the dragon and when the music stops (ie. your skill timer resets), start spamming your tame macro. You'll get 5-10 hits in (mostly failures). As soon as the dragon takes a step towards you, hit the area peace macro again.
Regroup and retry.
Once you get a successful attempt, you'll lead-tame the dragon, walking forward while he angrily follows you. In the time it takes to either succeed or fail at the tame attempt, you'll usually take 1 fire breath. (G-drags do 100% physical damage so make sure your armor suit is maxed out on phys resist). If you fail, immediately hit the area peace key. Heal up if necessary and start again.
If you succeed, voila
It took me about a week of dying to get the timing of the macro's down, but now that I have it, it's fairly easy and I rarely die. If you get into a situation where the dragon is pounding on you, just area peace and run away.
Area peace gives just enough time to get into position and hit macros. It's not a long peace like directly peacing a creature, but direct peace often fails on high level monsters like g-drags. Having a dragon slayer instrument helps.
I like this way because I don't need to worry about honor points or really anything... it's all skill based. And there's a little bit of adrenaline involved to keep it interesting