Update 2/24:  Removed 2 ox, added another gallia and anax.  Was originally concerned that it would be too many legendaries but it hasn't proven to be a problem and the extra copies are usually welcome.  It further cements Gallia's card draw and interaction with Anax's satyrs.  Anax is a huge draw for removal, which often leaves larger things free to swing away.  Adjusted sideboard to better fit the meta as I see it.  Also took out 2 scrylands for standard lands, to help curve out more smoothly.

Update 2/23:  Just played ladder after a couple days away.  Updated the record in the title.  Can't remember what the 4th loss to.  Been facing mostly mono red and azorius control.  I at or close to tier 2 diamond.

I've removed 2 pelt collectors for paradise druids. 

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This list has taken me from Gold to Diamond tier 4, going 19 and 3 in Bo3 over the last 3 days.

Last 3 match ups: mono red cavalcade: 2-0, UW control: 2-0, Simic flash: 2-1.

Decks this has lost to: mono white, temur adventures twice.

Card choices-

Adventure package: Card draw and utilities

Pelt collector: 1 mana for something that can become a threat?  Sure.  Might be removed later for an extra 2 copies of paradise druid.

Paradise druid: 2 of these (maybe 4 see above) not so much for ramp as for mana stabilization, though the turn 3 questing beast is always welcome.

Questing Beast:  obvious 4 of

Anax: I thought to myself, what edge does mono red have over Gruul, and how can we do it better?  Anax can repopulate the board after a wipe, and notably leaves Satyrs.

Gallia: Used occasionally in gruul lists for her second bit of text.  She card draw cards for you attacking in groups.  With a total of 32 in the main, you're going to find yourself having plenty of chances.  The +1/+1 gets ignored.  Not here.  In matches with boardwipe decks, you might hold her back, to power a line of satyrs.

Ox: decent power and recursion, potentially netting you an extra 6 cards.  Just remember to double check if there is a Narset on the field.

Sideboard-

Phoenix of Ash: Sideboard in against control, provides haste, recursion, evasiveness, mana sink, and a dangerous target for embercleave.  Can help deal with a dream trawler by killing it or putting out more damage than the trawler can heal.

Lava coil: mirror, cat oven, rakdos, monowhite

return to nature: lots of decks may have something that you'll want to deal with, especially after sideboarding.

unchained berserker:  not a lot of mono white out there, but they are a hassle when you do come across them.

Redcap melee: red decks.  mostly to make quick work of torbran if he shows up.  Otherwise as long as you're patient, you will overwhelm them with better creatures.

I welcome feedback and your own results.  I can discuss why certain cards weren't used if anyone wishes.  Gruul has lots of good options, but many of them are one dimensional.