When East Heretic Wong Yerk See first met Gwok Jing in LOCH, the Lord of Peach Blossom Island was not at all impressed by the young man. In terms of intellect, personality, and martial arts level, Gwok Jing did not leave a favorable first impression on Wong Yerk See at all.
Nonetheless, Wong Yerk See *did* give Gwok Jing a chance with his daughter, Wong Yung. Wong Yerk See did, after all, give Gwok Jing a chance to prove himself in the contest with Au Yeung Hak rather than awarding Wong Yung to Au Yeung Hak outright, which would have been Wong Yerk See's preference.
How much do you think that Gwok Jing's status as the student of North Beggar Hung 7 Gung helped him to gain at least this modicum of consideration from Wong Yerk See? Wong Yerk See might not have been impressed by Gwok Jing overall, but the fact that Gwok Jing was Hung 7 Gung's student must have left some positive impression on Wong Yerk See. Hung 7 Gung, after all, was one of the few people whom Wong Yerk See respected and regarded as a peer, and Hung was also one of the few people whom Wong deigned to call a friend.
Had Gwok Jing's martial arts pedigree been solely the Gong Nam 7 Freaks or members of the Cheun Jen 7 Disciples, I bet that Wong Yerk See wouldn't have given him a second thought.