More than a join it looks like filtering + grouping to me.
You can easily solve your task with just two nodes:
1) a Reference Row Filter node, to filter out the rows from Table 1 which have no correspondence with the Names in Table 2. Then you can pass the filtered table to
2) a GroupBy node, grouping on the Name column and manually aggregating the GO column with Concatente aggregation method and a comma "," as Value Delimiter (option at the bottom of the configuration window).