Both teams thew everything onto the game but could not score at Seoul World Cup Stadium, the results means that Seoul now need a win at Kashima Antlers in their final group match to be certain of progressing.
Guangzhou looked good early in the first-half with Elkesen beating Kim Jin-kyu to the ball on the left edge of the area but only to hammer his shot into the side-netting.
In the 12th minute Seoul should have scored when a free-kick from Lee Sang-hyeob was headed over the bar from a few yards out by Kim Hyun-sung.
Gao Lin missed a great chance in the 26th minute when Kim Jin-kyu passed the ball to Gao who held onto the ball instead of passing to hammer his shot wide.
The second started quietly until Zeng Cheng made a great diving save to deny a curling Kim Jin-kyu free-kick from going in.
The Chinese champions came close just after the hour. Zheng Zhi drove a free-kick from the right into the crowded area and Zhang Linpeng headed the ball over the bar.
Guangzhou had a great chance to take the lead with 17 minutes remaining.
Elkesen passed the ball across the face of the goal and a flick from Ricardo Goulart from close-range bounced off the Seoul goalkeeper and was cleared off the goal line by Ko Kwang-min.
Elkesen nearly got the winner in injury time but his shot went wide of the post.