I don't know of any Adventist college in Australia that first opened 1907, but you may be referring to Avondale College, which was established in 1897.
Macarthur Adventist College was created in 1897.
Suva Adventist College was created in 1993.
Sonoma Adventist College was created in 1968.
Longburn Adventist College was created in 1908.
Samoa Adventist College was created in 1978.
Hills Adventist College was created in 1961.
Brisbane Adventist College was created in 1966.
Carmel Adventist College was created in 1907.
Sydney Adventist College was created in 1919.
Brisbane Adventist College's motto is 'Everything with God'.
Longburn Adventist College's motto is 'Commitment and Excellence'.
Mountain View Adventist College was created in 1968.