The defender has been linked with a move to north London from Lille, following the winger last season.
And the Brazilian has already teased hints on his social media channels.
But Pepe has now engaged with his former team-mate on Instagram.
Alongside a picture of him playing, Magalhaes, 22 wrote: “What makes me happy."
“I admit you speak English," he wrote.
Lille defender & reported Arsenal target Gabriel Magalhães on Instagram: “What makes me happy.” [IG: _gabrielmagalhaes]
Nicolas Pepe comments on Gabriel’s post: “I admit you speak English ”#afcpic.twitter.com/C5wIf4PoEz — afcstuff (@afcstuff) August 7, 2020