Depends what gas - I had a primus stove and could only get find the specific canisters from high quality camping shops and certain decathlons, outside of france it became pretty useless.
The blue Campinggaz canisters were alot easier to find and sold in most supermarkets
You can get a small converter to make the Camping gaz (pierce able) cylinder fit screw fit stoves
You can get a small converter to make the Camping gaz (pierce able) cylinder fit screw fit stoves