Despite his recent reprimand, Gautam Gambhir feels his team has what it takes to make it to the semi-finals. After their victory over The Royal Challengers, he had nothing but praise for Bangalore and was thrilled with his team's victory over them.
Naturally, any one would be thrilled with a win. Moreover, his team will be entering the semis which itself is a great idea. It's a sense of well being which prompted him to say so.
There is nothing wrong with rejoicing after a win but I wouldn't relax after a win. They should be more focused on the games because the teams in the semis are much harder to compete with.