Not sure who had him top 5, but it would be someone who valued "close to majors" over "upside". The comparison is apt as Gilmartin has lost a LOT from the guy he was pre-draft as has Wimmers.
oh just Fangraphs, BA (actually #4) and MLB.com Jerod Mayo. No one who knows anything.
You may be right that he's not worth much but he has the potential too. This from mlbtraderumors is interesting too.
"Gilmartin struggled through injuries and posted a 5.06 ERA across three levels in 2013, averaging 6.9 K/9 and 2.8 BB/9 in a total of 105 innings. Selected with the No. 28 overall pick in the 2011 draft, Gilmartin draws praise for his polish from both BA and MLB.com. BA writes that his 89-91 mph fastball has good movement and is complemented by a plus changeup and a slider with "sharp, late break." According to Mayo, "[Gilmartin's] ceiling is somewhat limited, but he's not far from being ready to step in as a middle-of-the-rotation type in the big leagues."
Now if that Mayo quote is to be believed then this is a great move for the Twins a mid rotation guy is nothing to sneeze at considering the Twins have just committed like 85 million to essentially two 3-4 starters (Hughes/Pelfrey) and one 2-3 starter (Nolasco) this offseason. That might be overvaluing these three guys two It could be argued none of them are better than 3 type starter. Anyhow, I like the move, don't see the Wimmers comp. Sure both have lost value but Wimmers almost never had it. At least Gilmartin had a solid 2012 campaign.