Hi,
Sorry, we don’t have a specific import plugin for Infineon DAVE, however the regular import mode in the wizard should be a good starting point (you would still need to specify include directories/preprocessor macros manually).
The “redefinition of variables” error most likely happens because the imported project includes a copy of some system files (e.g. peripheral drivers or startup files) that are already included in the VisualGDB project. It could be solved by locating such files and ensuring that you only leave one copy of them (i.e. either remove the one from the imported project, or unreference the corresponding embedded framework via VisualGDB Project Properties). Feel free to post the exact error message here and we can give more specific advice.