It's too young to ID at this point, but when it's 3-4ft tall, post some more photos, particularly of the petioles, Gros Michel cultivars typically have a distinct red margin on the petiole edges. This won't be a 100% ID, but if the plant looks very different, or has other distinguishing traits, it can rule some things out.
This is a 'Highgate' Gros Michel showing this typical trait.
