Even if there is penetration but no climax, is ghusl is not wajib?

Ruling 348. If a person has sexual intercourse with a woman and penetration occurs up to or more than the circumcised part of the penis – irrespective of whether the penetration was in the vagina or in the anus, and whether the man had reached the age of legal responsibility (bulūgh) or not – then, even if semen is not ejaculated, both the man and the woman become junub.

In such a case, Ghusl will be wajib if there was penetration to that extent