During chapter 4 "The Surprise" there is a line about "I got you a present ........ Well more like a medical experiment" first off it gives me the willies cuz of the fact it's a medical experiment add to that a robotwho is severly pissed at you! The horror! But I digress I need the full quote as I can't seem to find it aanywhere and I'm not talented enough to write it down as she's saying it! Thanks in advance!

This is from the "subtitles_english.txt" file, which you can find in "resource" folder:

GLaDOS: I shouldn't spoil this, but... remember how I'm going to live forever, but you're going to be dead in sixty years? Well, I've been working on a present for you. Well, I guess it's more of a medical procedure. Well, technically it's more of a medical experiment. You know how excruciating it is when someone removes all of your bone marrow? Well, what if after I did that, I put something back IN that added four years to your life?

It wasn't there but thank you for your help ma'am or sir!

Found it!
I shouldn't spoil this, but... remember how I'm going to live forever, but you're going to be dead in sixty years? Well, I've been working on a present for you. ?Well, I guess it's more of a medical procedure. ?Well, technically it's more of a medical experiment. But the important thing is it's a present!