Add this new section to the very top of your ROGMGame.ini
[GMGameInfoTerritories ROUIDataProvider_GameModeInfo]
GameMode=GreenMenMod.GMGameInfoTerritories
GameSettingsClass=ROOnlineGameSettingsTerritories
GameSearchClass=ROOnlineGameSearch
DefaultMap=GMTE-Christmas2018
Prefixes=GMTE
OptionSet=GMTE
;;ROUIDataProvider_GameModeInfo.uc needs to be fed some data!
[GMGameInfoSupremacy ROUIDataProvider_GameModeInfo]
GameMode=GreenMenMod.GMGameInfoSupremacy
GameSettingsClass=ROOnlineGameSettingsSupremacy
GameSearchClass=ROOnlineGameSearch
DefaultMap=GMSU-BeachParty2019
Prefixes=GMSU
OptionSet=GMSU
[GMGameInfoSkirmish ROUIDataProvider_GameModeInfo]
GameMode=GreenMenMod.GMGameInfoSkirmish
GameSettingsClass=ROOnlineGameSettingsSkirmish
GameSearchClass=ROOnlineGameSearch
DefaultMap=VNSK-Compound
Prefixes=GMSK
OptionSet=GMSK