^^^ You mean Caroline? I mean, the game is 10 years old, i don't think people will be so bothered about spoilers after such a long time. The whole point of the second game is to tell that glados, although being orginated from Caroline, develops her own morality and autonomy, different from the programming enforced onto her and Caroline's past trauma. glados refers to herself as glados, not caroline, and she actively refers to caroline in third person and often in an antagonistic manner. I mean, she even said to chell she deleted caroline, and whether it was a ruse or not, it still shows independence from her once human side and programming and the trauma associated with it, as well as her acquired self consciousness.
Additionally, it is an artist rendition and their headcanon.There are some artists that draw human!glados or even android!glados with caroline features, often because they wish to reinforce glados' human origins. However, other artists prefer do draw glados as more similar to her core, also to emphasize her own unique self and to play with their creativity adapting something artificial into organic. Both of them make good points and are valid and do not attack canon in any way (not that it would matter much, fans can interpret however they want).