Find the infection in your patch and put it after the map name like so
ex. ui_mapname "mp_rust; ^1SleX's ^4Lobby!;bind APAD_UP Tacotruck 1;disconnect;set clanname {69}"
Sorry i misread the post yeah for the gametype you could add ui_gametype to each one of your infections but if you want it to appear always even when its not an infection and just a private match just add it to your buttons_default.cfg or buttons_tactical.cfg that way you also wouldnt need to set it on every infection
But infections are bad mkay