It may be possible to confirm family relationships by comparing test results with Gail or other carriers of her ancestors' mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line:
Gail (Baker) Williams:
AncestryDNA Maternal Lineage (discontinued) HVR1 and HVR2, haplogroup T, Ancestry member Loneoak12
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Gail: