A 66-year-old alleged Gold Coast drug runner has been charged after police seized $1 million of cannabis hidden in the "sophisticated" false cavity of a ute he was driving last month.

Acting on a public tip-off that came via interstate police, Queensland detectives intercepted a ute the man was travelling in with his partner on the Warrego Highway at Withcott, west of Toowoomba, on June 4.

The couple had allegedly travelled from South Australia with 200 cry-vac bags of dried cannabis with a street value of at least $1 million.

A search of the vehicle found a false floor had been welded underneath the 2014 ute's tray, which Drug and Serious Crime Group Detective Inspector Lance Vercoe described as a "sophisticated, hydraulic operated false cavity".