SharePoint 2010 Sync Custom List with GridView webpart

We have SharePoint 2010 Free version without BDC or InfoPath.

My goal is to get data from an SQL Query into a SharePoint Custom List. I can’t use the SP Custom List External Data source because that requires BDC and InfoPath.

I’ve been successful in creating a webpart with .aspx GridView that does the query. I’ve deployed the page on SP and it correctly displays the results of the SQL Query.

I’ve seen many articles about how to get data from a SP List into a GridView, but I can’t find ANY reference to going the opposite direction. Is there any way to get data from my Gridview webpart into a Custom List, and keep it refreshed?

Thanks,

Joe