i wont tell you what to do but ill give you reasons for both
yes:
its a good gcse in general, theres nothing wrong with it per se
will help if you take a level maths
it might be good when applying to 6th form/college but i dont think so
no:
most, if not none, 6th forms/colleges actaully require it
unis wont look at your gcses other than maths and english - its your a levels they want
you may struggle in it as you said which you dont want