"make me a server script that i can put into a remote event in the workspace that turns a model that is in another model invisible after i click a button and tell me how to set it up using a screen gui"

-- Server script (Workspace.RemoteEvent) 
local remoteEvent = game:GetService("ReplicatedStorage"):WaitForChild("RemoteEvent")

local function onEventFired(player)
    local model = game.Workspace.Model.SubModel
    for i, v in pairs(model:GetChildren()) do
        if v:IsA("BasePart") then
            v.Transparency = 1
        end
    end
end

remoteEvent.OnServerEvent:Connect(onEventFired)

-- Local script (ScreenGui.Button) 
local button = script.Parent
local remoteEvent = game:GetService("ReplicatedStorage"):WaitForChild("RemoteEvent")

local function onButtonClicked()
    remoteEvent:FireServer()
end

button.MouseButton1Click:Connect(onButtonClicked)

-- To set this up, you need to:
1. Create a RemoteEvent in ReplicatedStorage and name it "RemoteEvent".
2. Create a Screen GUI in StarterGui and add a Button to it.
3. Put the local script under the Button and the server script under the RemoteEvent.
4. Replace "Model" and "SubModel" in the server script with the names of your models.
5. Run the game and click the button to make the model invisible.