A couple of years back, Machine Gun Kelly and G-Eazy were beefing over Halsey, who called MGK "pathetic" for pointing out that he hit it first.
That's all water under the bridge, thanks in part to peacemaker Eminem.
In fact, when MGK announced the tracklist to his upcoming album Tickets To My Downfall, both G-Eazy and Halsey reacted positively. (Halsey certainly should -- she's featured on the track "Forget Me Too.")
Machine Gun Kelly is shacked up with Megan Fox these days, so maybe G Eazy no longer sees him as a romantic rival.