Any ammo reliability issues with the gsg?You can go two ways on this.
A conversion unit. Its a slide assembly you swap out the centerfire slide with.
or
A dedicated .22 pistol.
I have no experience with the conversion units.
I've heard the Marvel units are GTG.
https://www.marvelprecision.com/unit-2/
I went with the GSG 1911-22.
Wanted a full size for training/practice
They're not expensive.
Not target grade accuracy. Minute of soda can.
Nowadays there are aftermarket goodies for them.