Answer:
Yes! it should remain in the same genus...
Step-by-step explanation:
Although most of them have a 40% GC content but some species of for example lactobaccilus may have more GC than that e.g., Lactobacillus delbrueckii has a GC content of 62% while Lactobacillus fermentum has a GC content of 63% and both of them also belong to the same genus. So, it should remain in same Genus classification.