This is Gz1 but Enlarged.  I is still on the small side but might be better suited for more players.
GG_Resol_Gz2 Map Info

• Size: Small(ish)
• Bots: Nav file included.
• Spawn Points: 12 for each side (this map might work better then Gz1 with that many players
• Discription: A central room with 3 levels and two entry points for each team.
• Creators Thoughts: Nothing really since its Gz1 but wider.
• Bugs: same as Gz1,  the entry locations for each team are easly seen from the other side.