ok um

[maskatchi]

ok so the script is:

function initGUI( ) 
    btnOutput = guiCreateButton( 0.7, 0.1, 0.2, 0.1, "Output!", true ) 
  
 addEventHandler ( "onClientGUIClick", btnOutput, outputEditBox, false ) 
  
    editBox = guiCreateEdit( 0.3, 0.1, 0.4, 0.1, "Type your message here!", true ) 
    guiEditSetMaxLength ( editBox, 128 )  
end 
addEventHandler( "onClientResourceStart", getResourceRootElement( getThisResource( ) ), initGUI ) 
  
function outputEditBox ( button ) 
    if button == "left" then 
        local text = guiGetText ( editBox ) 
        outputChatBox ( text )  
    end 
end 

how would i make it so the gui only pops up for admins?

[JR10]

Server side:

addEvent ( "onPlayerDownloadResource" , true ) 
addEventHandler ( "onPlayerDownloadResource" , root , 
     function ( ) 
          if hasObjectPermissionTo ( source , "function.banPlayer" , false ) then 
            triggerClientEvent ( source , "initGUI" , source ) 
          end 
     end 
) 

Client side:

function initGUI( ) 
    btnOutput = guiCreateButton( 0.7, 0.1, 0.2, 0.1, "Output!", true ) 
  
 addEventHandler ( "onClientGUIClick", btnOutput, outputEditBox, false ) 
  
    editBox = guiCreateEdit( 0.3, 0.1, 0.4, 0.1, "Type your message here!", true ) 
    guiEditSetMaxLength ( editBox, 128 ) 
end 
addEvent ( "initGUI" , true ) 
addEventHandler ( "initGUI" , root , initGUI ) 
  
addEventHandler( "onClientResourceStart", getResourceRootElement( getThisResource( ) ), function ( ) triggerServerEvent ( "onPlayerDownloadResource" , getLocalPlayer()) end) 
  
  
function outputEditBox ( button ) 
    if button == "left" then 
        local text = guiGetText ( editBox ) 
        outputChatBox ( text ) 
    end 
end 

[Castillo]

Well, firstly, you'll need a server & a client side script, but, I done the job for you, and seems to be working .

-- client side

addEventHandler( "onClientResourceStart", getResourceRootElement( getThisResource( ) ), 
function () 
    triggerServerEvent("isPlayerAdmin",getLocalPlayer(),getLocalPlayer()) 
end) 
  
function initGUI() 
    btnOutput = guiCreateButton( 0.7, 0.1, 0.2, 0.1, "Output!", true ) 
    addEventHandler ( "onClientGUIClick", btnOutput, outputEditBox, false ) 
    editBox = guiCreateEdit( 0.3, 0.1, 0.4, 0.1, "Type your message here!", true ) 
    guiEditSetMaxLength ( editBox, 128 ) 
end 
addEvent("returnIsPlayerAdmin",true) 
addEventHandler("returnIsPlayerAdmin",root,initGUI) 
  
function outputEditBox ( button ) 
    if button == "left" then 
        local text = guiGetText ( editBox ) 
        triggerServerEvent("outputAdminText",getLocalPlayer(),text) 
    end 
end 

-- server side

addEvent("isPlayerAdmin",true) 
addEventHandler("isPlayerAdmin",root, 
function (client) 
    local account = getPlayerAccount(client) 
    if not account or isGuestAccount(account) then return end 
    local accountName = getAccountName(account) 
    if isObjectInACLGroup("user."..accountName,aclGetGroup("Admin")) then    
        triggerClientEvent(client,"returnIsPlayerAdmin",client) 
    end 
end) 
  
addEvent("outputAdminText",true) 
addEventHandler("outputAdminText",root, 
function (text) 
   outputChatBox(tostring(text)) 
end) 

P.S: I added the outputChatBox server-sided because, it would have been output only to the client with your way.