"gaping disparity" is a correct and usable phrase in written English.
You can use it to describe two situations where the difference between them is so great that it appears to be gaping or "open". For example, "There is a gaping disparity between the salaries of the CEO and the lowest-paid employee in the company."
That gaping disparity provides further evidence that Texas's governor, Legislature, courts and voters should reassess their addiction to executions.
For decades, Chile's economy has been marked by two things: dynamic growth and a gaping disparity between the rich and the poor.
In other words, a measured dose of faux insanity is being used to make up for a gaping disparity in conventional military and economic strength.
Burdened with the cost of desegregation, the Yonkers school board originally sued in 1987, hoping to get the state to pay part of the cost for remedying "vestiges of segregation" like the gaping disparity in test scores.
It seemed a piece of a phenomenon that I described in 2016: for Russia, "a measured dose of faux insanity is being used to make up for a gaping disparity in conventional military and economic strength".
So it must constantly convince the United States, and the West as a whole, that it is a little crazy". In other words, a measured dose of faux insanity is being used to make up for a gaping disparity in conventional military and economic strength.
Many of those were gaping disparities.
It was a moment that exposed gaping disparities within this city while bringing many of us together in common cause.
Today, despite gaping disparities between black and white Americans in income, education, health care, homeownership, employment and college admissions, a majority of white Americans now believe they are just as likely, or more likely, to face discrimination as black Americans.
As ever, the focus quickly landed on the gaping disparities at Stuyvesant.
In the contest for the White House, the stakes are plain and enormous: the rights of women; the fate of the earth; the gaping disparities of income and opportunity; the stability of the Middle East, South Asia, and Europe.
