GAP Jupyter kernel not available
For persons wanting to use GAP - Groups, Algorithms, Programming, note that there is a long-standing bug. For that reason, we removed the GAP Jupyter kernel from CoCalc.
As a workaround, you can work with GAP in a Sage worksheet (file in CoCalc ending in .sagews). Start that file in a single block of code with:
%auto
%default_mode gap
and then run it via shift-return. At this point, you are working with GAP in Sage.