Not Tigerle, but my daughter and I have been researching UK universities. Some list a minimum GPA in entry requirements and some don’t. You will have to dive into the website for each university you are interested in. And funnily enough sometimes they will ask for three 4+s on APs and a 1200 SAT, but only want a 3.0 for GPA or just say “successful completion of the High School Diploma”. I do think you have to report your grades, though.
You apply directly to the Course (meaning ‘course of study’/major) and different Courses at the same university have different entrance requirements. All of this is published on their websites. You can also look at UCAS (https://www.ucas.com) which is the UK equivalent of the Common App. They have some very helpful videos that will walk you through the steps.