Can I make a group rank to game script?

We can build a table to map rank names (otherwise known as roles) to titles, and look up the player's role in it:

local GroupId = 1
local Prefix = "[SCP]"
local GroupRoleToTitle = {
    ["Level-1"] = "Card-L1",
    ["Level-900"] = "Really High Level Person With a Lot of Authority"
}

local function OnPlayerAdded(Player)
    local Role = Player:GetRoleInGroup(GroupId)
    local Title = GroupRoleToTitle[Role]

    print(Title) --> The title!
end

local Players = game.Players:GetPlayers()

for Index = 1, #Players do
    -- Just in case players join before the event is connected in Studio!
    local Player = Players[Index]

    OnPlayerAdded(Player)
end

game.Players.PlayerAdded:Connect(OnPlayerAdded)