Newcastle went down 3-2 to fellow relegation candidates Norwich away from home at Carrow Road in the Premier League.
The Magpies looked set to earn a valuable point on the road, but Martin Olsson scored in the third minute of injury time for the home team.
Former Newcastle midfielder Gutierrez was following the match, and he has reacted passionately on Twitter to the defeat.
The Argentine has urged the Newcastle fans to maintain faith in the team and seems confident that Rafael Benitez’s side will not get relegated to the Championship at the end of the season.
I Cant believe The result, no Way to lost after scored on The 86 , 7 games to go i believe and we can. We r NEWCASTLE— Jonas Gutierrez (@elgalgojonas) April 2, 2016
One tweet for The #nufc fans. Still believe. I came from Cancer because i believe so we can stay up if we believe. Come geordie nation— Jonas Gutierrez (@elgalgojonas) April 2, 2016
What The players need at The moment Is support. We still fighting. Come on #nufc— Jonas Gutierrez (@elgalgojonas) April 2, 2016
No lack of effort today. A lot better 2nd half but defensively still very poor. #nornew— Alan Shearer (@alanshearer) April 2, 2016
The defeat to Norwich means that Newcastle remain second from bottom in the Premier League table.
The Magpies are two points behind 18th-placed Sunderland and six behind Norwich, who are currently 17th in the standings and have played a game more.