The former Blaugrana boss was thrilled after his current employers made it 10 wins in a row in Europe's premier club cup competition with a 3-1 triumph at CSKA Moscow
The Bavarians beat CSKA Moscow 3-1 on Wednesday to take their winning steak to 10 games, one more than the previous mark set by the Blaugrana during the 2002-03 season.
Guardiola was enthused by the way in which his players made light of a poor pitch to set a new benchmark for Champions League excellence.
"The historical record fills me with pride," the 42-year-old trainer told Sky Germany. "It is very nice for the club. Ten wins in a row is really good.
"The pitch was not good, but we made the best of it. I think that the players already showed in the last season that they have a good character."
Guardiola singled summer signing Mario Gotze out for special praise, with the former Borussia Dortmund playmaker having scored a fine goal in diffiicult conditions.
"Mario Gotze has played well," he stated. "I am pleased with him and his performance. I liked it. He is very smart, he can show many of his qualities."
Meanwhile, Arjen Robben, who was also on target in Moscow, stated that Bayern are more interested in trophies than records, but was nonetheless proud of their achievement.
"The football field was not very good," the Dutch winger added. "It was slippery and wet. But we are professionals and have won and that makes me happy.
"Regarding the record, we are very proud - we do not play for records, only for titles. Still, it's a super streak. We have a good character and have achieved the best."