The Giallorossi have secured the signing of the Ivorian, Arsenal confirmed on Thursday, who becomes the Italian side's fifth major signing this summer
Gervinho, 26, has agreed a contract with the Giallorossi - though how long it is for has not been announced yet - and will team up with former Lille coach Rudi Garcia, who has also joined the Serie A giants this summer.
The Ivorian forward, who failed to established himself as a first-team regular with Arsenal, becomes Roma's fifth major signing of the summer following Morgan De Sanctis, Maicon, Mehdi Benatia and Kevin Strootman to the Stadio Olimpico.
Arsenal said on the official website: "Gervinho has joined Italian Serie A side AS Roma for an undisclosed fee.
"Everyone at Arsenal would like to thank Gervinho for his contribution to the Club and wish him well for his future career."
Subsequently, Gervinho expressed his thanks to Gunners fans following his two-year stint at the Emirates Stadium having joined in 2011.
He said on Twitter: "Thanks to all Arsenal fans for their support during my two years as a Gunner. Thanks to all my team-mates and the Arsenal staff."
Roma have been looking to strengthen their squad following a disappointing campaign last year, having missed out on European football, finished sixth in Italy's top flight and runners-up to rivals Lazio in the Coppa Italia.
Gervinho made 18 Premier League appearances last season, scoring just five goals.