Gulce, we are glad that the installation was successful. However, we would require a screenshot of the error that you encounter> gfortran can't be found on the path.
Based on that, we would decide on continuing with our support on this forum or routing the thread to a different forum.
Hi, we believe we have been working the same issue that you had raised here: https://community.intel.com/t5/Registration-Download-Licensing/HPC-Toolkit-doesn-t-contain-Intel-MPI...
We will close this thread now as a duplicate and continue our support on that thread regarding your issue. Intel® will no longer be monitoring this thread.
Have a nice day!