The French coach felt the Bosnian's first-half strike at the Stadio Olimpico evoked memories of Diego Maradona and is now hoping the video goes viral.
The Giallorossi were struggling to break down a side that had won their last five games in Serie A when the Bosnian picked up the ball some 25 yards out before completely wrong-footing two defenders with a couple of sublime feints and then calmly rolling the ball past Christian Abbiati in the Rossoneri goal.
As far as Garcia was concerned, the goal was as important as it was beautiful.
"We made so many mistakes in the first 20 minutes and we were slow in possession of the ball," the French coach told Sky Sport Italia. "With the passing of some minutes, however, we grew and then came the act of a very great player like Pjanic.
"In the second half, we played better. The second half pleased me a lot. And Pjanic's goal was one of those that the whole world should see. If [Diego] Maradona had done it, it would have been celebrated by the entire planet."
Pjanic's sensational solo effort, which was followed up by a Gervinho tap in, helped draw Roma back to within five points of leaders Juventus.
The Bianconeri face relegation-threatened Sassuolo on Monday, but Garcia believes Antonio Conte's men could struggle, given their Europa League exertions against Benfica in Lisbon on Thursday.
"I'm happy with my team," the former Lille trainer said. "We have beaten Fiorentina and Milan, two quality teams, and we can dream again.
"The game against Sassuolo will be difficult for [Juve]. After a game in the Europa League, now they must quickly prepare for another."
Meanwhile, Garcia stood up for Mario Balotelli, who launched a stinging attack on Sky Sport Italia's pundits after being substituted in the game in the Italian capital.
"Today he showed great courage to come on TV, particularly because it's difficult to speak after a defeat," the Roma boss said.