Immediately, a divya vimāna (celestial vehicle) came for Indradyumna and took him to urdhva loka (the higher worlds). God never leaves good people. Lord Vishnu made Indradyumna realize that there is Kaivalyam which is beyond Swarga, all Urdhvalokas etc., through his next rebirth as Gajendra. He blessed him with Moksham when Gajendra left all his pride, doubt and totally surrendered himself to God.