GUI check

for i,v in next, game:GetService'Players':players() do
    for _,g in next, v:GetChildren() do
        if g:IsA("PlayerGui") then
            local list = {}
            for _,l in next, g:GetChildren() do
                table.insert(list,l.Name)
            end
            warn(v.Name.."      "..table.concat(list, "  "))
        end
    end
end