Monsters
3x Gladiator Beast Laquari
2x Thunder King Rai-Oh
2x Gladiator Beast Equeste
2x Gladiator Beast Darius
1x Gladiator Beast Retiari
1x Gladiator Beast Bestiari
1x Gladiator Beast Murmillo
1x Gladiator Beast Hoplomus
1x Effect Veiler

Spells
3x Gladiator Proving Grounds
2x Gladiator Beast's Respite
2x Forbidden Lance
2x Mystical Space Typhoon
1x Book of Moon
1x Monster Reborn
1x Pot of Duality
1x Dark Hole
1x Giant Trunade
1x Smashing Ground

Traps
3x Gladiator Beast War Chariot
2x Solemn Warning
1x Dimensional Prison
1x Mirror Force
1x Solemn Judgment
1x Trap Stun
1x Seven Tools of the Bandit
1x Call of the Haunted

Extra Deck
3x Gladiator Beast Gyzarus
2x Gladiator Beast Heraklinos
1x Chimeratech Fortress Dragon
1x Ally of Justice Catastor
1x Gaia Knight, The Force of Earth
1x Brionac, Dragon of the Ice Barrier
1x Black Rose Dragon
1x Scrap Dragon
1x Stardust Dragon
1x Colossal Fighter
1x Red Dragon Archfiend
1x Mist Wurm (Soon to be Trishula)

Thoughts:
No Test Tigers, no Prisma.

Now for the no TT part, it's easily understandable. Warning ruin everything and easily. For the no Prisma, I prefer to keep space for other stuff even though this might just become an even worse 5-backrow format. I prefer to keep my Glads consistent and keep that Bestiary alive. I am considering a 2nd Trap Stun for that.

Forbidden Lance act as the new Shrink, it's pretty good overall considering that attacking a defense position monster is always without risks, except losing some life points, which is acceptable. Rest of effect cover the loss of BoM too, so I might get this up to 3.

No Secutor, he's not good.

Considering a 2nd Hoplomus, great first turn set and block all LSS/ GK's except Shi En.

That Smashing Ground is being tested.

-1 Proving Grounds (I've never liked this at more than 2)

+1 Forbidden Lance (Great in GB's)

Other than that, I don't have much to say. It's hard to know what an optimal GB build is when none of them top events!

Updated.

Proving grounds = Hop/Laq/Besti, depending on what I need.