Bale, born in Cardiff, put in a sublime cross for the first of Cristiano Ronaldo's two goals as the UEFA Champions League winners downed their Spanish counterparts 2-0 to seal their first title of the season.
The former Tottenham speedster said helping Carlo Ancelotti's side to the European silverware on Welsh soil was a personal highlight.
"It was a special night for me," Bale said.
"Obviously being back in my home town, playing in the Super Cup obviously, I didn't think it would ever happen again but it was great to be a part of it and great to win it."
"They've done great obviously, they [Kroos and Rodriguez] haven't had too much training or game time in pre-season so they've done really well and the most important thing is we had a good performance and we got the win," he said.
The 25-year-old said his personal fitness was better than it was 12 months ago, with Bale's off-season not filled with FIFA World Cup commitments, unlike so many of his club team-mates.
"I hope so, I've been working hard in pre-season," said Bale, when asked if he was in better condition than a year ago.
"I'm obviously in better shape than I was coming into last season so yeah, I'm looking forward to it and hopefully I can improve on last season."
