Mario GB, known online as User Mario Gb, is a German male adult performer specializing in amateur gangbang and creampie videos. Active in the European fetish scene, particularly within the GB-Chief collective, he has participated in numerous high-volume group sex productions featuring multiple partners. His scenes often involve intense, uncut action with themes of cum swapping, swallowing, and orgies, collaborating frequently with performers like User Wolle Gb, User Specki Gb, User Fieldstaff Gb, and various female stars such as Didi Devil, Ashley CumStar, and Fit XXX Sandy.
On XVideos, he boasts 666 videos and 566 subscribers, ranking #67 among German male pornstars. Mario GB's contributions highlight the raw, participatory nature of modern amateur porn, appealing to fans of extreme group encounters. His work spans indoor, outdoor, and public settings, maintaining popularity into 2026.