[Nightness]

Edit: NVM figured it out.

local frame = CreateFrame("Frame", "GetZoneInfoFrame");
frame:RegisterEvent("ZONE_CHANGED");
frame:RegisterEvent("ZONE_CHANGED_NEW_AREA");
frame:SetScript("OnEvent", function ()
	local zoneName, areaName, worldName, instanceType, isManaged = GetZoneInfo();
end);

-- Returns: zone, area, world, instanceType, isManaged (Blizzard made the group)
-- ZoneTypes: "unknown", "world", "dungeon" (despite group type),
--       "raid" (despite group type), "battleground", or "arena".
local function GetZoneInfo()
	local name, type, difficultyIndex, difficultyName, maxPlayers, dynamicDifficulty, isDynamic, instanceMapId, lfgID = GetInstanceInfo();
	local isRestricted = HasLFGRestrictions();

	if (type == nil or type == "") then type = "unknown"
	elseif (type == "none") then type = "world"
	elseif (type == "party") then type = "dungeon"
	elseif (type == "pvp") then type = "battleground" end

	local isManaged = false;
	local area = GetRealZoneText();
	local zone = GetMinimapZoneText()
	if (type == "arena" or type == "battleground" or isRestricted) then isManaged = true end

	return zone, area, name, type, isManaged;
end