Default Automatic Bank Transfer to Google Wallet Balance?

I have two bank accounts, one for bills, another one incidentals like personal stuff, groceries, gas, etc. I have a Google Wallet Card on the way, and I was thinking about using this for spending instead of the 2nd bank account. I thought it would be cool to be able to automatically transfer money to the card every month, but I'm not sure how you would go about doing this. Anyone have any ideas?
Nexus 5
Stock ROM, Franco Kernel, Xposed Framework

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