Gilberto has told his Brazil team-mates not to underestimate Republic of Ireland in Wednesday's friendly.
The game at Croke Park has been overshadowed by the delayed appointment of a successor to Steve Staunton as Republic of Ireland coach.
But Gilberto believes any internal strife in the Republic squad could inspire the home side to raise their game against Brazil.
The Arsenal midfielder is wary of the threat posed by players such as Robbie Keane but is nevertheless confident that Brazil will come out on top.
He said: "I think it's a good motivation for them and we expect a difficult game. Every game for us is really hard because most of the teams play their best against us.
"We just have to have our own game in mind, although we will be very careful about Ireland and try to take advantage of their weakest points.
"I know some of their team, especially Robbie Keane. The last time we played them it was a really hard, difficult game and tomorrow I expect the same."
Brazil coach Dunga is set to name a strong team despite the withdrawal of Kaka, and there could be an opportunity for Manchester United midfielder Anderson.
Gilberto has been impressed by how the youngster has adapted quickly to the demands of the Premier League.
"It's fantastic to see, especially in a different position," said Gilberto.
"He has changed his style completely but he is doing well and I think he can produce much more for his quality."