I'm guessing that your friend is suggesting that b/c glutamine has been shown to increase glycogen resynthesis rates, post-workout, that by combining your creatine w/ glutamine would be warranted.
IF, in fact, that's his point, you'd be better served by combining creatine w/ a high-dose of BCAAs (Leucing, Valine & Isoleucine).
Also, if you're already consuming creatine w/ a carbohydrate load or some other insulin mimetic (ex: 4-hydroxyisoleucine, rALA, d-Pinitol, etc), then there's little reason that I'm aware of stating improved absorption by coingestion of creatine + glutamine.
As a final sidenote, glutamine is highly over-rated. As an anti-catabolic, there are FAR better amino acids to use. Besides, even at its best, an efficacious daily dose of glutamine is approx 20g per day.
Hope this has helped. - chris