GF may not be a miler, but he has shown himself easily capable of 3:35. Only ~70 performances have been clocked faster indoors than his 3:55.02 but more than 2000 have been recorded <=3:35.4. Sure, the indoor mile is not contested as often, but a 1900+ performance difference speaks for itself.
Furthermore, he crushed 3:35 man Dorian Ulrey in his wire-to-wire NCAA victory; the 3:39.00 winning time taken out of context misrepresents the talent of everyone involved.