I did geography for GCSE and I think your best choice if you like them both equally is to think about essay writing skills. History is majority essay writting, so if you feel confident at that then history is a good option. However if you are not so confident (like me) at essay writing then geography has (in my exam board) at the most 9 markers. I can't speek for history however I very much enjoyed geography, it is lots of remembering facts and case studies but for the most part I found it interesting.
Hope this helps!