When Gana and Bhakoot is zero it means that you have Gana dosha and also Bhakoot dosha. Gana gives temperamental problems in marriage leading to separation while Bhakoot is not good on the health front. You should do proper matching of the horoscopes and see if these doshas get cancel. If they get cancel then marriage can be considered.
You can read more about Bhakoot dosha from the link below.