The Global Clan In-House Cup is an one day cup organized and sponsored by Global Clan and. Only players who are part of Global Clan can play 

It's played online on Europe Battle.net-servers.

It's a one day cup, double elimination bracket : all matches except the final are Bo3 final is Bo5

$100 are spread among the top players

https://liquipedia.net/warcraft/Global_Clan_In-House_Cup/1

1st round of WB - bo1

1st 2 rounds of LB - bo1

All bo3 till Grand Final bo5

Grand Final - 1-0 for the player which comes from winner bracket.

• Amazonia
• Echo Isles
• Last Refuge
• Northern Isles
• Terenas Stand LV
• Twisted Meadows
• Concealed Hill

veto till one map left for bo1

Veto till 3/5 maps left with losers pick for bo3/bo5