Ramsey will now face a long, and possibly frustrating, rehabilitation period following surgery as he aims to return as good as ever.
Gilberto - back at Arsenal last night for Brazil's friendly with Republic of Ireland - was at Birmingham when striker Eduardo suffered a similar horrific injury two years ago, and witnessed the Brazil-born Croatian international slowly recover over time.
The 33-year-old, who joined Panathinaikos in the summer of 2008, himself overcame a potentially career-threatening back injury which kept him out for seven months, during when he had to wear a brace, before returning to action at the end of April 2005 as the Gunners went on to lift the FA Cup.
Gilberto feels Ramsey could not be in better hands with the Arsenal medical staff, but must remain patient.
"I am very sorry for him because he is such a young and talented player," Gilberto told the club's official website, www.arsenal.com.
"I wish him all the best for a very good recovery - but it is very good here at Arsenal with Arsene Wenger and the medical staff because they do not rush the player. They give them time to recover.
"I hope he is patient because it is not going to be easy.
"I had a back problem a few years ago and the best way is to be patient and be with your family.
"It is the kind of thing you cannot change so only do the rehabilitation with the physio when you are able to."
Gilberto added: "He does not have to rush and has time because he is only 19.
"It is very important for him to have a good recovery. If he rushes himself to be back too quickly, maybe he will have a setback in his recovery.
"He needs to be strong, especially mentally.
"He must not think 'I am young and I have this injury' because he will be back.
"He just needs to be patient and stay positive."
Ramsey had impressed with his development since joining from Cardiff in 2008, and Gunners supporters group REDaction are to show their appreciation with an 18ft banner which is hoped to be in place for Saturday's Barclays Premier League home match against Burnley.
Gunners boss Wenger is now left with something of a gap in his midfield, given Alex Song must serve a two-match suspension after picking up a 10th yellow card of the season at Stoke.
However, Abou Diaby is in contention to return from a knee problem, while combative Brazilian Denilson is another option and Russian playmaker Andrey Arshavin should also be back in contention after his hamstring strain.
Arsenal were linked with a move for Denilson's compatriot Felipe Melo during the summer when he was at Fiorentina.
The midfielder, now at Juventus, started the 2-0 win over Ireland at Emirates Stadium last night, and Wenger remains a fan.
The Arsenal manager said: "We were interested in Melo during the summer.
"Then he went to Juventus and that team has struggled and certainly he has not had the season that everyone predicted he would.
"We still think he is a very talented player and are still looking at him, but at the moment we are not in need of buying central midfielders."