i dont do a language a level, but my friend is and he said that they speak the language there 24/7, like literally teach in the language, ive heard languages are very hard so i dont think it would be wise if you havent done gcse. in your case though, languages are useful for alot of jobs, they wont care about an a level in french if you just replace it with "fluent in french", besides a level french will take alot of time, probably more than you need to be fluent for everyday use