Gul also said that the case of Jamal Khashoggi is being "thoroughly" investigated and "results are expected to come out soon".
Turkish government sources have said police believe the journalist was killed by a special team of 15 Saudi officials sent to Istanbul especially for the task.
The Washington Post published a column it received from his assistant after he was reported missing in which Khashoggi condemns the crackdown on journalists by Arab governments and the failure of the global community to respond.
"I don't want to get into his mind, but it sounded to me like maybe these could have been rogue killers", he added. "This is the last piece of his I will edit for the Post", Attiah wrote.
Turkish police on Wednesday began searching the residence of the Saudi consul in Istanbul for their investigation, with forensics experts in white overalls entering the building, an AFP correspondent said.
France's finance minister has canceled his attendance at an upcoming investment conference in Saudi Arabia amid doubts over the disappearance of Saudi journalist Jamal Khashoggi.
US media outlets have reported that Riyadh, despite its earlier denials of involvement, will acknowledge that Khashoggi was killed in a botched interrogation.More news: DAZN Exec: De La Hoya The Most Important Figure in PPV History
Mr Khashoggi, an outspoken critic of Saudi Crown Prince Mohammed bin Salman, vanished after entering the consulate to obtain documents relating to his upcoming wedding to fiancee Hatice Cengiz. "More important, we need to provide a platform for Arab voices". He was the head of Saudi Arabia's Forensic Commission at the time of his visit to Australia, VIFM's annual report from 2014-2015 notes.
Khashoggi provided examples of crackdowns on the free press in the Arab world, actions he said prevent citizens from knowing the true facts and coming to their own conclusions on issues.
The Saudi government has vehemently denied these allegations but, after more than two weeks, still hasn't provided any evidence Khashoggi is alive.
However, Turkish media reported that it appeared as though the consulate had been swept by Saudi agents before the search.
Asked if the USA would be willing to walk away from Saudi Arabia, Trump said: "I do not want to do that and frankly they have a tremendous order, $110 billion", referring to a promised United States arms sales to the kingdom.
According to a New York Times report, the money landed in American accounts on Tuesday and was for purported American efforts to stabilize areas in Syria liberated from the clutches of the Daesh Takfiri terrorist group. At another point, he said, "I'm not sure yet that it exists".
He was critical of some of Saudi Arabia's policies.
Treasury Secretary Steve Mnuchin has tweeted he's pulling out of the Future Investment Initiative summit in Saudi Arabia.