He doesnt make the goal at all. Doku made the goal. Gundos pass was a perfectly fine 5 yard pass 30 yards out from goal to Doku. The decent thing Gundo did was run through and take a defender away from the middle. But still, he was shit on Friday and has been shit since his return.
Assists tell you something. Not everything. The bloke who gave the ball to Maradona in his own half before he beat the entire England team in '86 would now get an assist. Whereas Gundo doesn't get one on Friday, yet he makes the goal.