Gilberto is aware that Arsenal's clash with Bolton could be decisive in the race for fourth place.
The Gunners have struggled in recent weeks, losing three matches in a row before being held to a 0-0 draw by Newcastle on Easter Monday.
With Thierry Henry, Robin van Persie and Theo Walcott all sidelined Arsenal have scored just once in their last four matches, and Gilberto admits the lack of goals has been a problem.
"Against Newcastle we created a few good chances, but again the ball did not go into the back of the net," said the midfielder.
"It would have been nice to have got three points, but one is better than nothing.
"It was frustrating not to score again, but if you look at the way we played, the attitude of the team was great."
Arsenal will fall to fifth if they lose to Bolton on Saturday, but Gilberto is confident his side can cling on to the final UEFA Champions League spot.
"We have an important game against Bolton. It will be crucial for us," he told Arsenal TV Online.
"We just have to focus on the next game and what we can do because we have the quality to change the situation when things are not so good.
"This match against Bolton will be decisive for fourth place."
Gilberto's Brazilian compatriot Julio Baptista, meanwhile, has insisted he is still in the dark about where his future lies.
Baptista is on loan from Real Madrid for the season in exchange for Jose Antonio Reyes, and he has yet to discover whether Arsenal will keep him beyond the summer.
"I still have not got a clue," he said.
"I do not know what will happen. I may stay here at Arsenal, I do not have an answer."