...and welcome to my first selfmade guide. I'm not this good at LoL, but i have given my best to make this guide so i hope you guys enjoy. Please leave a comment if you got any ideas, how I can make this guide better. :)

PS: If there are any mistakes in the grammar or in the spelling of this guide - sorry for that - I'm German ;)

Maybe anybody of you wodered about the 2 different Glyphs? I thought, it would be nice if you'd get more Aility Power in the lower levels, but also get a bit at level 18. It's your choice, if you choose my offer (2 different runes) or if you only take the "Greater Glyph of Force" or only the "Greater Glyph of Potency".

For a jungler, it's routine to buy "Cloth Armor" and 3 Potions first, so you can get more defense and fight longer against the monsters. With Gragas it's also good to buy many "Doran's Rings". I decided to buy only 2 instead of 3. In the later game you'll have to sell 1 "Doran's Ring" - otherwise it could be that you don't have free spaces to buy your last item: "Rabadon's Deathcap".
"Zhyona's Hourglass" is in my opinion a good choice for a Jungle-Gragas 'cause it's like a mixture of "Cloth Armor" and "Rabadon's Deathcap". "Will of the Ancients" is good for ganking because it got an Aura, that gives Allies +30 Ablility Power and +20% Spell Vamp.
Alternates to this Build are not speficic items. I think the items just have to have:

Armor raise
Health raise
A little bit Mana raise
Much Ability Power raise
An Aura for allies and yourself
Boots with enhanced Movement: 2

Good Summoner Spells are:
Smite: You can deal additional damage to monsters, wich is great when you fight big monsters like the Golem, Dragon or the Lizard.
Teleport: You can be, wehere you have to be. F.e if you want to gank but your allie is on the other side of the map, you can easily port yourself there.
Ghost: It's alternative to Teleport. You can move faster, to get faster where you want to be, to follow an opponent to kill him or just to run away yourself ;).
Exhaust: It's a little bit like "Ghost", if you want to follow your enemy, you easily can slow him with "Exhaust".
Flash: It's like a part of "Ghost" too. You can esape with it or just flash behind your opponent to open a gank.

I just don't like the other summoner spells on a jungler. ;)

My favorite Jungle path with Gragas is this one:
1. Opponent's Ghosts (lv. 1)
2. Your Wolves (lv. 2)
3. Your Ghosts (lv. 2)
4. Your little Golems (lv. 3)
Now I'd recall
5. Your Lizard to get the Red Buff (lv. 3)
6. Your Ghosts (lv. 4)
7. Your Wolves (lv. 4)
8. Your Golem to get the Blue Buff (lv. 5)
Recall
9. Your little Golems (lv. 5)
10. Your Ghosts (lv. 5)
11. Your Wolves (lv. 6)
Gank

Your strategy to fight the monsters shuld be:
Put the barrel roll in the middle of the monsters, let it explode after you did a bodyslam that (hopefully) hit the monsters ;P, then attack and do a bodyslam sometimes. For big mosnters like the Blue-Golem or the Red-Lizard (optionally the dragon) you can use Smite.

So that's it and I hope, you enjoyed my little guide. Please leave a comment if you found something, that would make my guide better.
See you guys then. Bye

--Softi2901