Hi irritable4life

There is a general account of genetic testing in the context of mental illness here: NIMH · Looking at My Genes: What Can They Tell Me?

My understanding is that the only commercially-available genetic test for different forms (alleles) of a gene which is a risk factor for Bipolar I is that for alleles of a gene called GRK3.

This approach has been criticized by mental health professionals on the grounds that there is no evidence that differences in the GRK3 gene are predictive of which medications might help people with Bipolar I - see At-Home Bipolar Disorder Test: Accuracy, Diagnosis, and More for more on this.