He played for the Blues Development team against their Chiefs counterparts at Waikato Stadium at the weekend and has now been given the opportunity to take his game to the next level.
Gatland is unlikely to be in the frame for the Crusaders when they play the British and Irish Lions in Christchurch on June 10, but should he still be in the mix then the media spotlight, particularly from the travelling British pack, would be considerable.
His call-up comes following the return of one-test All Black Lelia Masaga to the Chiefs as injury cover as the high intensity of the competition - particularly in the New Zealand derby matches - takes its toll.
The latest high-profile player to be ruled out is Highlanders and All Blacks loose forward Liam Squire, who injured a knee during the Crusaders match in Dunedin but played on and has now been sidelined for up to six weeks.
The injury continues a theme among the Highlanders loose forwards and will rule Squire out of the match against the Blues at Eden Park on Saturday, but the southerners could yet be boosted by the return from concussion of fullback Ben Smith.
Squire, who was noticeably fired-up on defence early against the Crusaders, impressed his coaches with his toughness in staying on for the remainder of the match, and there is no doubt his absence will affect the Highlanders pack against the Blues.
"It's huge," assistant coach Scott McLeod said of the injury blow. "We felt he had an outstanding night and really motivated a lot of our players. He did a lot of damage, but in saying that, we've got other players who will step into that void and hopefully bring that same intensity."
The Highlanders are already without loose forwards James Lentjies (dislocated elbow), Dan Pryor (knee) and Shane Christie (illness), but may welcome back No8 Luke Whitelock from a shoulder injury for the match against the Blues on Saturday night.
Tasman flanker Christie, a Highlanders co-captain last year, has been suffering from an undiagnosed illness which has ruled him out of pre-season and his team's first two matches.