tab1 = guiCreateTab("Info",tabPanel)
playerPingLabel = guiCreateLabel(8,165,320,18,"Your Ping:",false,tab1)
guiLabelSetColor(playerPingLabel,255,255,0)
playerIPLabel = guiCreateLabel(8,190,320,18,"Your IP: ",false,tab1)
guiLabelSetColor(playerIPLabel,255,255,0)
playerSrLabel = guiCreateLabel(8,211,320,18,"Your Serial: ",false,tab1)
guiLabelSetColor(playerSrLabel,255,255,0)
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local ping = getElementData ( getLocalPlayer(), "ping")
local ips = getElementData ( getLocalPlayer(), "ips")
local srs = getElementData ( getLocalPlayer(), "srs")
guiSetText ( playerSrLabel, "Your serial: " ..tostring(srs).. " " ,true,tab1)
guiSetText ( playerPingLabel, "Your Ping: " ..tostring(ping).. " " ,true,tab1)
guiSetText ( playerIPLabel, "Your ip: " ..tostring(ips).. " " ,true,tab1)
Try this.
edit: agree with BinSlayer1