Gaile Gray is the former Community Relations Manager for ArenaNet and the current Support Liaison.
She was known for appearances in game (with a Level 7 Ranger/Monk named Gaile Gray), where she conversed with players and organized giant conga lines. Gaile Gray mostly appeared in Lion's Arch, Kaineng Center, Shing Jea Monastery, Kamadan and Gunnar's Hold in International District 1. Like all game masters, her chat text appeared in purple (previously green) and she had a big, green "GM" sign above her character's head.
She has confirmed that she also has other characters (including a non-playing 'Canthan' character). These are on a different account though, and the names are kept secret, so that Gaile can enjoy some privacy while playing and converse with other players incognito.
It is confirmed that Gaile Gray sometimes controlled The Frog because, in one session, she was conversing with The Frog for being late, and accidentally sent a message as herself instead of The Frog.
Gaile is also shown on the Making Of Guild Wars DVD that came with Guild Wars Nightfall Collector's Edition.
Her birthday is on August 9th according to her public profile on the Guild Wars Guru forums .