Gisele Bündchen seems to still be processing her divorce from Tom Brady. The supermodel, 43, sat down for a candid interview with Robin Roberts for the special IMPACT x Nightline: Gisele Bündchen: Climbing the Mountain, where she was overcome with emotion when discussing the end of her 13-year marriage to the former NFL star, 46. After the Good Morning America anchor, 63, likened the divorce from Brady as the “death of a dream,” she asked Bündchen, “How are you?” “Well, when you say,” the cover girl began before turning her head away and putting her hand up to hide her deep sadness. “Sorry, gu…