The phrase "a dramatic gesture of" is correct and usable in written English.
It can be used to describe an action that is expressive or intended to convey strong emotions or significance.
Example: "The actor made a dramatic gesture of throwing his arms wide open to embrace the audience."
Alternatives: "a bold display of" or "a striking act of".
Were Mr. Kornitzer still alive, this counterfeiting would surely have precipitated a dramatic gesture of abhorrence and repudiation.
The only way Democrats stand any chance of persuading Republican electors to abandon Trump is with a dramatic gesture of true bipartisanship.
In a dramatic gesture of renewed friendship, Fabius said Hassan Rouhani, Iran's president, had been invited to make a state visit to France in November.
Mrs Clinton (and husband Bill) backed Mr Obama unequivocally, and in a dramatic gesture of support the narrow loser of the primary elections moved to suspend the floor count of delegates and confirm Mr Obama's nomination by acclamation.
Noting that the architects might include some solar panels or alternative power sources in the building, he added, "We want this to be a dramatic gesture of the way we should design buildings, not only in this area but throughout the country".
Displaying a dramatic gesture of humility.
So Monday's big moment demanded a dramatic gesture to grab the attention of the yawning political media, and Mr Pawlenty delivered.
But she transforms this technical display into a dramatic gesture — a fusion of the airy and the earthy, a dream that turns into a demand.
In a dramatic gesture before the judgement seat of the Bishop of Assisi, he stripped off his sumptuous clothing and deposited it at his father's feet.
Jorge Cifuentes was even more blunt, capping his pugnacious testimony with a dramatic gesture, miming an embrace in front of the defense table; Guzman's lawyers said it was an obscene, aggressive message to their client.
It seized the border town of Qaim and tore down border fences and bulldozed berms and ditches in a dramatic gesture meant to illustrate its goal of creating a unified Islamist caliphate.
