There is no 'list' of GCSEs per se that you choose from. Your school won't even have a department for at least some of them.
You need to wait until your school tells you what its core subjects are and how many options you have free/what you're choosing from.
For example, at my school we had a core of English Lang, English Lit, Maths, Science, French, IT, RE and one of the DTs (out of Electronics, Resistant Materials and Graphics). We then had two free options out of History, Geography, Music, PE and Art. Or, if you were smart enough, separate sciences.
Given how few options there were for me, I obviously plumped for History and separate sciences, as I gained extra GCSEs through the latter (and History is the best choice out of those on offer).
You'll want to think about covering Arts/Science bases and - crucially - choosing subjects that you enjoy and think you can do well in. At GCSE level it's less of an issue to take something like Drama or Business over Geography, despite the latter being more respected. It's only if you might want to do an A Level in Geography that you should pick it (or, unless I've used a bad example and you really enjoy/are great at Geo!)
In essence: don't stress so much. These choices need to come from you and no one else. Wait until A Levels to seek advice from the internet.