Hi,
The advanced CMake projects are not based on the Visual C++ project type, so the regular Visual C++ IntelliSense won’t work for them, hence VisualGDB does not allow disabling the Clang IntelliSense.
One option would be to create a regular non-advanced CMake project, however it would miss many usability features of the Advanced CMake Project Subsystem.
Please feel free to share the details on the issues you encounter with Clang IntelliSense and we will help you resolve them.