NHL's Evander Kane -- GF Takes Him Back ... Thanks to Billboard Stunt

He shoots, he SCORES!!!!

NHL superstar Evander Kane is officially out of the doghouse with his model girlfriend Mara Teigen ... who tells TMZ Sports she took him back after he put up a billboard on the Sunset Strip.

As we previously reported, Kane dropped some serious coin this weekend to put up a promotional ad for Teigen above 1 Oak -- one of the hottest places in L.A. -- hoping she'd be moved enough by the gesture to reconcile.

Well, good news for Kane ... 'cause we spotted Teigen out in L.A. this week -- and she told us THE STUNT WORKED!!!

Congrats bro -- seriously, 'cause she's smokin' hot.