If I remember correctly the mapping of the exhaust and intake flows and temps for most diesel turbos do not favor gas motors.

One of the biggest differences about a diesel motor most people are not aware of is that a diesel does not have an intake throttle.

From an intake perspective it is always WOT.

Another difference is that the fuel is also not injected or mixed during the intake stroke. There is an injector that uses hundreds or thousands of PSI to squeeze fuel into the cylinder when its time to make power and the piston is almost to the TDC of the compression stroke.

The 'throttle' on a diesel only effects how much fuel is injected.

Since a diesel is a motor that runs on spontaneous combustion it wants a hot wad of gas to spray some fuel into. Pressure = Heat which is the reason why each intake stroke wants to get all the air it can.

For these reasons a diesel will normally flow a certain amount of air for a certain RPM and the only thing the load changes is the average temp of the combustion gasses.

In a gas engine the heat of combustion per volume of air is fixed, but the amount of air the engine is fed is varied to control power.

Since turbine and compressor maps are combined and optimised based on things like volume, pressure and heat all these facts combine to make most diesel turbos specialized to their application.

I would not be suprised to learn that there are some that might be suitable for a gasoline engine though.