I'm pretty sure the poster you replied to meant the original Guild Wars, which, so far as I'm aware of, was a 'buy once, and play for life' model. No micro transactions there.
I recall there being other micro-transactions for cosmetics in Guild Wars 1 as well, across its early lifespan, but of course, it certainly was not quite to the degree of Guild Wars 2's "Gem Shop".
(ETA: You don't have to take my word for it. It was called "DirectSong": https://guildwars.fandom.com/wiki/DirectSong)