Definitely. While you may be doing other resits too, as long as you put enough time aside to just read over the maths topics, attempt questions and do past papers properly you should be fine.
What I'd do is get yourself a textbook or two such as the CGQ books which are quite handy for GCSE maths, and just do a topic every other day, read through them and attempt any of the example questions and just practise until you're good with the topic.
After you've had a chance to grasp most types of maths questions judt start doing past papers, mark them and keep a record of your scores and go over where you're going wrong.
Video tutorials may help quite a bit too, I used ExamSolutions for A Levels as he gives tutorials on each topic and does video solutions for past papers, believe he does just as much for GCSE level too.
So there ya go, short answer is yes it is definitely possible, just make sure you know when your exams are and how to structure your revision ahead of time.