Trump's offer echoed comments by U.S. Secretary of State Rex Tillerson earlier this week that the U.S.is committed to helping the Gulf Cooperation Council "remain unified".
Trump even suggested a White House meeting among Gulf officials to resolve the crisis.
Saudi Arabia, Egypt, the UAE and Bahrain severed relations with Qatar and closed their airspace to commercial flights on Monday, charging Doha with financing militant groups.
Asked about the policies of Mr Trump in the Middle East, Mr Gabriel said Germany did not support a policy of "pure confrontation" against Iran.
Previously, banks were generally required to provide such information monthly, they said.
A spokesperson for Maersk said: "We have confirmation that we will not be able to move Qatar cargo in and out of Jebel Ali".
- Qatar pulls out of Saudi-led coalition fighting in Yemen.
- Iranian Foreign Minister Mohammad Javad Zarif met Turkey's President Recep Tayyip Erdogan in Ankara on Wednesday, as the dispute between Gulf powers and Qatar escalates.
It said there had been a big "non-resident" deposits in Qatar's banks, and an increase in their lending to the government to fund infrastructure projects.
Qatar has released an initial report into the alleged hack of its state-run news agency, an incident which helped spark a diplomatic crisis between the energy-rich country and Arab nations.
United Kingdom general election 2017: Latest updates
The House of Commons holds 650 seats all up, and the Tories now hold a 330-seat majority against Labour's 229 seats. He asked: "It has come to my attention that pencils have been used in polling stations, the mark is erasable".
Gabriel, who is due to meet Saudi Arabia's foreign minister on Wednesday, said he was surprised by the intensity of the tensions erupting in the Gulf region.
Kuwait is leading efforts to find a mediated solution.
But he also said measures taken against Qatar this week by Saudi Arabia, the UAE and other Arab nations were not aimed at seeking new leadership in Doha. Qatar vehemently denies the accusations.
Qatar Airways announced today that all three flights organized by the airline last night to bring passengers from the Kingdom of Saudi Arabia (KSA) to Qatar have successfully reached Doha.
The Ministry of Economy and Commerce released a video on Tuesday that showed supermarket shelves packed with food and other goods after Qataris crowded into stores on Monday to stock up fearing shortages. It is the 18th-most-competitive country, according to the World Economic Forum's benchmark Global Competitiveness Report.
"Qatar hosts one of the largest USA military bases in the region", CNN reported.
The two held talks, though details of their discussions were not released. He said there were enough grain supplies for four weeks and that Qatar also had large strategic food reserves.
Bans on Doha's fleet using regional ports and anchorages are threatening to halt some of its exports and disrupt those of liquefied natural gas.
UAE-based newspaper Gulf News and pan-Arab channel Al-Arabiya reported the crackdown on expressions of sympathy towards Qatar.
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