the most important question first: no, they will not work with geckos. These are brushless ac motors with resolver feedback, which means you need a resolver feedback brushless motor drive. PacSci, API, and others make a drive that will work with these motors. This is an issue that will take you some work unless you get lucky and find the appropriate PacSci drive..
I'm sure they have enough torque for a big router. For one thing, they are delivering the rated torque you list at 3000 rpm, so you can gear it down if you want. Peak torque is 39 in-lb, so that's quite a bit more.