find the studs and span them with 1/2" plywood, then attach your bracket to the plywood. this spreads the load across two studs. I think Gearbox is aluminum framing though so might not even need to do that, one would be sufficient, especially if you remove it for travel.
DIRT BIKES RULE
'12 Duramax CC short bed
2019 Wildcat Maxx 285RKX