  Baryon acoustic oscillation measurements by the Dark Energy Spectroscopic
Instrument (Data Release 1) have revealed exciting results that show evidence
for dynamical dark energy at $\sim3\sigma$ when combined with cosmic microwave
background and type Ia supernova observations. These measurements are based on
the $w_0w_a$CDM model of dark energy. The evidence is less in other dark energy
models such as the $w$CDM model. To avoid imposing a dark energy model, we
reconstruct the distance measures and the equation of the state of dark energy
independent of any dark energy model and driven only by observational data. To
this end, we use both single-task and multi-task Gaussian Process regression.
Our results show that the model-agnostic evidence for dynamical dark energy is
much less than the evidence from DESI with the $w_0w_a$CDM model. Our analysis
also provides model-independent constraints on cosmological parameters such as
the Hubble constant and the matter-energy density parameter at present. We find
that the reconstructed values of these parameters are not consistent with the
results reported in DESI with the $w_0w_a$CDM model. However, they are almost
consistent with DESI for the $w$CDM model.
