My finished GFG quilt was hand pieced - I did not do the EPP method on that one. I made the flowers drawing the 1/4 inch seam line on each one. When I was ready to attach them with a white path between them it took a while and trial and error to get my rhythm. Hope I can write what I did and it makes sense. Starting with the first one I made the path (18 white hexagons), then attached the path to the flower. The next flower I would attach it to the completed flower, it will connect to 4 of the hexagons on the left side, then I made the next path using 14 hexagons and attached it to the flower. That was row one. (I work left to right when I sew my rows.) I also made 1/2 flowers so the rows would be even. And I would set the next row into the first row, sew it, then make the path and sew it on.
You have to figure out what works easiest for you. I have seen on-line where a lady did it with her machine. That was a lot of stop and turning for me because of all the "Y" seams.
Maybe it you show us a picture of what you have we can give more specific assistance.