The genotype likelihoods for this variant call. Each array entry
represents how likely a specific genotype is for this call. The value
ordering is defined by the GL tag in the VCF spec.
If Phred-scaled genotype likelihood scores (PL) are available and
log10(P) genotype likelihood scores (GL) are not, PL scores are converted
to GL scores. If both are available, PL scores are stored in