Mr. Thumb's up and his "gil"

I went to Starbucks with woman from Sweden yesterday. I wore a t-shirt with the Facebook thumbs up button, and the Japanese text that goes with it (いいね). The guy we ordered our matcha lattes from thought the t-shirt was very funny and complimented me on my choice of clothes today.

When we got our matcha cups, mine had a thumbs up drawing and いいね written in katakana (イイネ). This was pretty easy to figure out, but the other cup said "GIL". My guess is that it means "girl", which I guess is an accurate description of who it was for. Though not that discriminative, there were many other girls in the same Starbucks.