How to choose frame from free energy landscape

GROMACS version:2021
GROMACS modification: Yes/No
Respected sir.
Sir i generated the 2D plot of Free energy landscape. which i am attaching.
Sir my question is how i know which frame has a minimum energy . and also i want to generate free energy landsacpe diagram between Radius of gyration, RMSD, and free energy.

Shailesh Mani Tripathi
Central University of Rajasthan