According to the ASCII art it's "GLADOS"

Check [this][1] page. Look at the second post, click Show and scroll down to GLADOS you'll see the same ASCII art there in reference to that name.

EDIT: In case that page goes away here it is

	"GLADOS1" "[12.000]       #+ @      # #              M#@   "
	"GLADOS2" "[12.000] .    .X  X.%##@;# #   +@#######X. @#%  "
	"GLADOS3" "[12.000]   ,==.   ,######M+  -#####%M####M-    #"
	"GLADOS4" "[12.000]  :H##M%:=##+ .M##M,;#####/+#######% ,M#"
	"GLADOS5" "[12.000] .M########=  =@#@.=#####M=M#######=  X#"
	"GLADOS6" "[12.000] :@@MMM##M.  -##M.,#######M#######. =  M"
	"GLADOS7" "[12.000]             @##..###:.    .H####. @@ X,"
	"GLADOS8" "[12.000]   ############: ###,/####;  /##= @#. M "
	"GLADOS9" "[12.000]           ,M## ;##,@#M;/M#M  @# X#% X# "
	"GLADOS10" "[12.000].%=   ######M## ##.M#:   ./#M ,M #M ,#$ "
	"GLADOS11" "[12.000]##/         $## #+;#: #### ;#/ M M- @# :"
	"GLADOS12" "[12.000]#+ #M@MM###M-;M #:$#-##$H# .#X @ + $#. #"
	"GLADOS13" "[12.000]      ######/.: #%=# M#:MM./#.-#  @#: H#"
	"GLADOS14" "[12.000]+,.=   @###: /@ %#,@  ##@X #,-#@.##% .@#"
	"GLADOS15" "[12.000]#####+;/##/ @##  @#,+       /#M    . X, "
	"GLADOS16" "[12.000]   ;###M#@ M###H .#M-     ,##M  ;@@; ###"
	"GLADOS17" "[12.000]   .M#M##H ;####X ,@#######M/ -M###$  -H"
	"GLADOS18" "[12.000]    .M###%  X####H  .@@MM@;  ;@#M@      "
	"GLADOS19" "[12.000]      H#M    /@####/      ,++.  / ==-,  "
	"GLADOS20" "[12.000]               ,=/:, .+X@MMH@#H  #####$="



  [1]: http://www.halflife2.net/forums/showthread.php?132014-spoiler-end-credits-ascii-art&s=47f8784d3936ccaf0bdb7fa9a0323c84