scoobs,
i found when trying to tame greaters that resists were paramount. that fireball they have can practically one shot you with low fire resists, so if you can i'd pump your phys and fire up to 70s. Fire that low will end up with you making a lot of death runs, which can ruin enjoyment.
second although you only need 110/110 to control a gd, having only 115 taming will lead to more failures in the taming process, extending the duration, leading to a rougher time. are 120 taming PS's within your reach on your server? if they are, i would recommend one, and then temporarily boost your taming to 120 just for the process of picking up the tougher pets... gd's, rune beetles, bane dragons, etc. The 120 taming power scroll isn't REQUIRED, but it will make your work easier, so give it consideration.
i think this should be doable for you with a few minor tweaks. first off since you have no eval you can use Mind Blast and it requires no Eval and will hit the GD's lowest resist, cold. Next grab a dragon slayer mage book, they are pretty cheap and available usually (or inscribe one if you have time but i wager there is a cheap one in housing right now).
Drag the GD to be tamed over to that east room near the water elementals (but not close enough to aggro them). Position some of those rock formations between you and the GD. As it chases you Keep the rocks between you and dragon until you are ready to tame, that will eliminate melee attacks and you'll only have to contend with its nukes and fire breath.
Disco and then begin to nuke it down til around 10% of its life. The dragons fire breath is HP based so the less HP it has, the less damage its breath will do. Once its low on health it becomes a cake walk, it will be out of or low on mana, and you can proceed to invis tame it, no honor needed.
some other things that can make your life easier is protection so you can heal/invis through attacks and orange petals to cure the poison it will cast. If it nukes you too much just quickly offscreen and heal and come back. Lastly an ethy or throw away horse (there is a horse in a stable in skara brae always available to tame) would be useful. Use it as a mount until you are ready to tame then release it.
When you get your new GD, feed it and either gate it out from the safe room (if you are in tram), or tell it all stop, all stay, invis it, you run out/recall and then relog at the stables and the dragon will appear next to you. that will eliminate aggro bringing it out of destard...
Let us know how it goes and also what server you are on. If you are on Sonoma I can help.