Both teams came in to the match with one win and one loss and were playing for points towards the finals series.
The 'Ikale Tahi were also looking to repeat the result of last years match against the USA Eagles in Kingsholm.
Tonga put the pressure on early and never let up throughout the game.
Both wings got in on the scoring action with Fetu'u Vainikolo bagging a double and Telusa Veainu getting over the line.
Impressive kicking from first-five Kurt Morath also led the way towards their 33-19 victory.