The Government Travel Transparency Act directs the Comptroller General of the United States to publish quarterly reports on federal aircraft use by top government officials, including the President, Vice President, and heads of major agencies and departments. The reports must identify when these officials use federal aircraft for political activities or elections and note whether the government was reimbursed, as well as instances when personal travel by federal aircraft was more expensive than alternative transportation methods. The first report is due within 30 days of the law's enactment, with subsequent reports issued every three months. The Comptroller General will gather information from the General Services Administration but cannot include the specific location of officials at particular times for security reasons. This legislation aims to increase transparency and accountability regarding government spending on executive travel.